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Expression simplification/ Factorization polynomials/ x^2+x-4

Factor polynomial x^2+x-4

An expression to simplify:

The solution

You have entered [src] 
 2        
x  + x - 4
(x2+x)−4\left(x^{2} + x\right) - 4 
x^2 + x - 4
Factorization [src] 
/          ____\ /          ____\
|    1   \/ 17 | |    1   \/ 17 |
|x + - - ------|*|x + - + ------|
\    2     2   / \    2     2   /
(x+(12−172))(x+(12+172))\left(x + \left(\frac{1}{2} - \frac{\sqrt{17}}{2}\right)\right) \left(x + \left(\frac{1}{2} + \frac{\sqrt{17}}{2}\right)\right) 
(x + 1/2 - sqrt(17)/2)*(x + 1/2 + sqrt(17)/2)
The perfect square
Let's highlight the perfect square of the square three-member
(x2+x)−4\left(x^{2} + x\right) - 4
To do this, let's use the formula
ax2+bx+c=a(m+x)2+na x^{2} + b x + c = a \left(m + x\right)^{2} + n
where
m=b2am = \frac{b}{2 a}
n=4ac−b24an = \frac{4 a c - b^{2}}{4 a}
In this case
a=1a = 1
b=1b = 1
c=−4c = -4
Then
m=12m = \frac{1}{2}
n=−174n = - \frac{17}{4}
So,
(x+12)2−174\left(x + \frac{1}{2}\right)^{2} - \frac{17}{4}
General simplification [src] 
          2
-4 + x + x
x2+x−4x^{2} + x - 4 
-4 + x + x^2
Trigonometric part [src] 
          2
-4 + x + x
x2+x−4x^{2} + x - 4 
-4 + x + x^2
Powers [src] 
          2
-4 + x + x
x2+x−4x^{2} + x - 4 
-4 + x + x^2
Assemble expression [src] 
          2
-4 + x + x
x2+x−4x^{2} + x - 4 
-4 + x + x^2
Common denominator [src] 
          2
-4 + x + x
x2+x−4x^{2} + x - 4 
-4 + x + x^2
Combinatorics [src] 
          2
-4 + x + x
x2+x−4x^{2} + x - 4 
-4 + x + x^2
Numerical answer [src] 
-4.0 + x + x^2
-4.0 + x + x^2
Rational denominator [src] 
          2
-4 + x + x
x2+x−4x^{2} + x - 4 
-4 + x + x^2
Combining rational expressions [src] 
-4 + x*(1 + x)
x(x+1)−4x \left(x + 1\right) - 4 
-4 + x*(1 + x)
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