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Least common denominator sqrt(b^2*((1-(b^2-a^2)/(b^2+a^2))^2+(2*a-b*sqrt(1-((b-a)*(b+a)/(b^2+a^2))^2)^2)))

An expression to simplify:

The solution

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       /    /                                                       2\ 
      /     |             2                 ________________________ | 
     /      |/     2    2\                 /                      2  | 
    /     2 ||    b  - a |                /      /(b - a)*(b + a)\   | 
   /     b *||1 - -------|  + 2*a - b*   /   1 - |---------------|   | 
  /         ||     2    2|              /        |     2    2    |   | 
\/          \\    b  + a /            \/         \    b  + a     /   / 
$$\sqrt{b^{2} \left(\left(2 a - b \left(\sqrt{1 - \left(\frac{\left(- a + b\right) \left(a + b\right)}{a^{2} + b^{2}}\right)^{2}}\right)^{2}\right) + \left(- \frac{- a^{2} + b^{2}}{a^{2} + b^{2}} + 1\right)^{2}\right)}$$
sqrt(b^2*((1 - (b^2 - a^2)/(b^2 + a^2))^2 + 2*a - b*(sqrt(1 - (((b - a)*(b + a))/(b^2 + a^2))^2))^2))
General simplification [src]
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       /    /         /           2                    \                2\ 
      /   2 |   4     |  / 2    2\           2        2|       / 2    2\ | 
     /   b *\4*a  + b*\- \a  + b /  + (a + b) *(b - a) / + 2*a*\a  + b / / 
    /    ----------------------------------------------------------------- 
   /                                          2                            
  /                                  / 2    2\                             
\/                                   \a  + b /                             
$$\sqrt{\frac{b^{2} \left(4 a^{4} + 2 a \left(a^{2} + b^{2}\right)^{2} + b \left(\left(- a + b\right)^{2} \left(a + b\right)^{2} - \left(a^{2} + b^{2}\right)^{2}\right)\right)}{\left(a^{2} + b^{2}\right)^{2}}}$$
sqrt(b^2*(4*a^4 + b*(-(a^2 + b^2)^2 + (a + b)^2*(b - a)^2) + 2*a*(a^2 + b^2)^2)/(a^2 + b^2)^2)
Fraction decomposition [src]
sqrt(b^2 - b^3 + b^6/(a^4 + b^4 + 2*a^2*b^2) + b^7/(a^4 + b^4 + 2*a^2*b^2) - 2*b^4/(b^2 + a^2) + 2*a*b^2 + a^4*b^2/(a^4 + b^4 + 2*a^2*b^2) + a^4*b^3/(a^4 + b^4 + 2*a^2*b^2) - 2*a^2*b^4/(a^4 + b^4 + 2*a^2*b^2) - 2*a^2*b^5/(a^4 + b^4 + 2*a^2*b^2) + 2*a^2*b^2/(b^2 + a^2))
$$\sqrt{\frac{a^{4} b^{3}}{a^{4} + 2 a^{2} b^{2} + b^{4}} + \frac{a^{4} b^{2}}{a^{4} + 2 a^{2} b^{2} + b^{4}} - \frac{2 a^{2} b^{5}}{a^{4} + 2 a^{2} b^{2} + b^{4}} - \frac{2 a^{2} b^{4}}{a^{4} + 2 a^{2} b^{2} + b^{4}} + \frac{2 a^{2} b^{2}}{a^{2} + b^{2}} + 2 a b^{2} + \frac{b^{7}}{a^{4} + 2 a^{2} b^{2} + b^{4}} + \frac{b^{6}}{a^{4} + 2 a^{2} b^{2} + b^{4}} - \frac{2 b^{4}}{a^{2} + b^{2}} - b^{3} + b^{2}}$$
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     /                    6                   7               4                    4  2                4  3                 2  4                2  5           2  2 
    /   2    3           b                   b             2*b          2         a *b                a *b               2*a *b              2*a *b         2*a *b  
   /   b  - b  + ----------------- + ----------------- - ------- + 2*a*b  + ----------------- + ----------------- - ----------------- - ----------------- + ------- 
  /               4    4      2  2    4    4      2  2    2    2             4    4      2  2    4    4      2  2    4    4      2  2    4    4      2  2    2    2 
\/               a  + b  + 2*a *b    a  + b  + 2*a *b    b  + a             a  + b  + 2*a *b    a  + b  + 2*a *b    a  + b  + 2*a *b    a  + b  + 2*a *b    b  + a  
Numerical answer [src]
(b^2*((1.0 - (b^2 - a^2)/(a^2 + b^2))^2 + 2.0*a - b*(1.0 - (a + b)^2*(b - a)^2/(a^2 + b^2)^2)^1.0))^0.5
(b^2*((1.0 - (b^2 - a^2)/(a^2 + b^2))^2 + 2.0*a - b*(1.0 - (a + b)^2*(b - a)^2/(a^2 + b^2)^2)^1.0))^0.5
Expand expression [src]
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               /              2                                   
   ____       /  /     2    2\            /           2        2\ 
  /  2       /   |    b  - a |            |    (b + a) *(b - a) | 
\/  b  *    /    |1 - -------|  + 2*a - b*|1 - -----------------| 
           /     |     2    2|            |                 2   | 
          /      \    b  + a /            |        / 2    2\    | 
        \/                                \        \b  + a /    / 
$$\sqrt{2 a - b \left(- \frac{\left(- a + b\right)^{2} \left(a + b\right)^{2}}{\left(a^{2} + b^{2}\right)^{2}} + 1\right) + \left(- \frac{- a^{2} + b^{2}}{a^{2} + b^{2}} + 1\right)^{2}} \sqrt{b^{2}}$$
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       /    /             2                                  \ 
      /     |/     2    2\            /           2        2\| 
     /    2 ||    b  - a |            |    (b + a) *(b - a) || 
    /    b *||1 - -------|  + 2*a - b*|1 - -----------------|| 
   /        ||     2    2|            |                 2   || 
  /         |\    b  + a /            |        / 2    2\    || 
\/          \                         \        \b  + a /    // 
$$\sqrt{b^{2} \left(2 a - b \left(- \frac{\left(- a + b\right)^{2} \left(a + b\right)^{2}}{\left(a^{2} + b^{2}\right)^{2}} + 1\right) + \left(- \frac{- a^{2} + b^{2}}{a^{2} + b^{2}} + 1\right)^{2}\right)}$$
sqrt(b^2*((1 - (b^2 - a^2)/(b^2 + a^2))^2 + 2*a - b*(1 - (b + a)^2*(b - a)^2/(b^2 + a^2)^2)))
Assemble expression [src]
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       /    /             2                                   \ 
      /     |/     2    2\            /            2        2\| 
     /    2 ||    b  - a |            |     (a + b) *(b - a) || 
    /    b *||1 - -------|  + 2*a + b*|-1 + -----------------|| 
   /        ||     2    2|            |                  2   || 
  /         |\    a  + b /            |         / 2    2\    || 
\/          \                         \         \a  + b /    // 
$$\sqrt{b^{2} \left(2 a + b \left(\frac{\left(- a + b\right)^{2} \left(a + b\right)^{2}}{\left(a^{2} + b^{2}\right)^{2}} - 1\right) + \left(- \frac{- a^{2} + b^{2}}{a^{2} + b^{2}} + 1\right)^{2}\right)}$$
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       /    /             2                                  \ 
      /     |/     2    2\            /           2        2\| 
     /    2 ||    b  - a |            |    (a + b) *(b - a) || 
    /    b *||1 - -------|  + 2*a - b*|1 - -----------------|| 
   /        ||     2    2|            |                 2   || 
  /         |\    a  + b /            |        / 2    2\    || 
\/          \                         \        \a  + b /    // 
$$\sqrt{b^{2} \left(2 a - b \left(- \frac{\left(- a + b\right)^{2} \left(a + b\right)^{2}}{\left(a^{2} + b^{2}\right)^{2}} + 1\right) + \left(- \frac{- a^{2} + b^{2}}{a^{2} + b^{2}} + 1\right)^{2}\right)}$$
sqrt(b^2*((1 - (b^2 - a^2)/(a^2 + b^2))^2 + 2*a - b*(1 - (a + b)^2*(b - a)^2/(a^2 + b^2)^2)))
Combinatorics [src]
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           /    2 / 4    4      3        3      2  2\ 
  ___     /  a*b *\a  + b  + 2*a  - 2*a*b  + 2*a *b / 
\/ 2 *   /   ---------------------------------------- 
        /                4    4      2  2             
      \/                a  + b  + 2*a *b              
$$\sqrt{2} \sqrt{\frac{a b^{2} \left(a^{4} + 2 a^{3} + 2 a^{2} b^{2} - 2 a b^{3} + b^{4}\right)}{a^{4} + 2 a^{2} b^{2} + b^{4}}}$$
sqrt(2)*sqrt(a*b^2*(a^4 + b^4 + 2*a^3 - 2*a*b^3 + 2*a^2*b^2)/(a^4 + b^4 + 2*a^2*b^2))
Trigonometric part [src]
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       /    /             2                                  \ 
      /     |/     2    2\            /           2        2\| 
     /    2 ||    b  - a |            |    (a + b) *(b - a) || 
    /    b *||1 - -------|  + 2*a - b*|1 - -----------------|| 
   /        ||     2    2|            |                 2   || 
  /         |\    a  + b /            |        / 2    2\    || 
\/          \                         \        \a  + b /    // 
$$\sqrt{b^{2} \left(2 a - b \left(- \frac{\left(- a + b\right)^{2} \left(a + b\right)^{2}}{\left(a^{2} + b^{2}\right)^{2}} + 1\right) + \left(- \frac{- a^{2} + b^{2}}{a^{2} + b^{2}} + 1\right)^{2}\right)}$$
sqrt(b^2*((1 - (b^2 - a^2)/(a^2 + b^2))^2 + 2*a - b*(1 - (a + b)^2*(b - a)^2/(a^2 + b^2)^2)))
Rational denominator [src]
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          /    /                                  2                                                      \ 
         /     |         2 /        2         2  \               2                2                      | 
        /    2 |/ 2    2\  |       a         b   |      / 2    2\        / 2    2\             2        2| 
       /    b *|\b  + a / *|1 + ------- - -------|  - b*\b  + a /  + 2*a*\b  + a /  + b*(a + b) *(a - b) | 
      /        |           |     2    2    2    2|                                                       | 
     /         \           \    b  + a    b  + a /                                                       / 
    /       ---------------------------------------------------------------------------------------------- 
   /                                                           2                                           
  /                                                   / 2    2\                                            
\/                                                    \b  + a /                                            
$$\sqrt{\frac{b^{2} \left(2 a \left(a^{2} + b^{2}\right)^{2} + b \left(a - b\right)^{2} \left(a + b\right)^{2} - b \left(a^{2} + b^{2}\right)^{2} + \left(a^{2} + b^{2}\right)^{2} \left(\frac{a^{2}}{a^{2} + b^{2}} - \frac{b^{2}}{a^{2} + b^{2}} + 1\right)^{2}\right)}{\left(a^{2} + b^{2}\right)^{2}}}$$
sqrt(b^2*((b^2 + a^2)^2*(1 + a^2/(b^2 + a^2) - b^2/(b^2 + a^2))^2 - b*(b^2 + a^2)^2 + 2*a*(b^2 + a^2)^2 + b*(a + b)^2*(a - b)^2)/(b^2 + a^2)^2)
Common denominator [src]
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     /                    6                   7               4                    4  2                4  3                 2  4                2  5           2  2 
    /   2    3           b                   b             2*b          2         a *b                a *b               2*a *b              2*a *b         2*a *b  
   /   b  - b  + ----------------- + ----------------- - ------- + 2*a*b  + ----------------- + ----------------- - ----------------- - ----------------- + ------- 
  /               4    4      2  2    4    4      2  2    2    2             4    4      2  2    4    4      2  2    4    4      2  2    4    4      2  2    2    2 
\/               a  + b  + 2*a *b    a  + b  + 2*a *b    a  + b             a  + b  + 2*a *b    a  + b  + 2*a *b    a  + b  + 2*a *b    a  + b  + 2*a *b    a  + b  
$$\sqrt{\frac{a^{4} b^{3}}{a^{4} + 2 a^{2} b^{2} + b^{4}} + \frac{a^{4} b^{2}}{a^{4} + 2 a^{2} b^{2} + b^{4}} - \frac{2 a^{2} b^{5}}{a^{4} + 2 a^{2} b^{2} + b^{4}} - \frac{2 a^{2} b^{4}}{a^{4} + 2 a^{2} b^{2} + b^{4}} + \frac{2 a^{2} b^{2}}{a^{2} + b^{2}} + 2 a b^{2} + \frac{b^{7}}{a^{4} + 2 a^{2} b^{2} + b^{4}} + \frac{b^{6}}{a^{4} + 2 a^{2} b^{2} + b^{4}} - \frac{2 b^{4}}{a^{2} + b^{2}} - b^{3} + b^{2}}$$
sqrt(b^2 - b^3 + b^6/(a^4 + b^4 + 2*a^2*b^2) + b^7/(a^4 + b^4 + 2*a^2*b^2) - 2*b^4/(a^2 + b^2) + 2*a*b^2 + a^4*b^2/(a^4 + b^4 + 2*a^2*b^2) + a^4*b^3/(a^4 + b^4 + 2*a^2*b^2) - 2*a^2*b^4/(a^4 + b^4 + 2*a^2*b^2) - 2*a^2*b^5/(a^4 + b^4 + 2*a^2*b^2) + 2*a^2*b^2/(a^2 + b^2))
Powers [src]
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       /    /             2                                  \ 
      /     |/     2    2\            /           2        2\| 
     /    2 ||    a  - b |            |    (a + b) *(b - a) || 
    /    b *||1 + -------|  + 2*a - b*|1 - -----------------|| 
   /        ||     2    2|            |                 2   || 
  /         |\    a  + b /            |        / 2    2\    || 
\/          \                         \        \a  + b /    // 
$$\sqrt{b^{2} \left(2 a - b \left(- \frac{\left(- a + b\right)^{2} \left(a + b\right)^{2}}{\left(a^{2} + b^{2}\right)^{2}} + 1\right) + \left(\frac{a^{2} - b^{2}}{a^{2} + b^{2}} + 1\right)^{2}\right)}$$
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       /    /             2                                  \ 
      /     |/     2    2\            /           2        2\| 
     /    2 ||    b  - a |            |    (a + b) *(b - a) || 
    /    b *||1 - -------|  + 2*a - b*|1 - -----------------|| 
   /        ||     2    2|            |                 2   || 
  /         |\    a  + b /            |        / 2    2\    || 
\/          \                         \        \a  + b /    // 
$$\sqrt{b^{2} \left(2 a - b \left(- \frac{\left(- a + b\right)^{2} \left(a + b\right)^{2}}{\left(a^{2} + b^{2}\right)^{2}} + 1\right) + \left(- \frac{- a^{2} + b^{2}}{a^{2} + b^{2}} + 1\right)^{2}\right)}$$
sqrt(b^2*((1 - (b^2 - a^2)/(a^2 + b^2))^2 + 2*a - b*(1 - (a + b)^2*(b - a)^2/(a^2 + b^2)^2)))
Combining rational expressions [src]
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       /    /         /         2                    \                2\ 
      /   2 |   4     |/ 2    2\           2        2|       / 2    2\ | 
     /   b *\4*a  - b*\\a  + b /  - (a + b) *(b - a) / + 2*a*\a  + b / / 
    /    --------------------------------------------------------------- 
   /                                         2                           
  /                                 / 2    2\                            
\/                                  \a  + b /                            
$$\sqrt{\frac{b^{2} \left(4 a^{4} + 2 a \left(a^{2} + b^{2}\right)^{2} - b \left(- \left(- a + b\right)^{2} \left(a + b\right)^{2} + \left(a^{2} + b^{2}\right)^{2}\right)\right)}{\left(a^{2} + b^{2}\right)^{2}}}$$
sqrt(b^2*(4*a^4 - b*((a^2 + b^2)^2 - (a + b)^2*(b - a)^2) + 2*a*(a^2 + b^2)^2)/(a^2 + b^2)^2)