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Factor polynomial m^2-n^2-m+n

An expression to simplify:

The solution

You have entered [src]
 2    2        
m  - n  - m + n
$$n + \left(- m + \left(m^{2} - n^{2}\right)\right)$$
m^2 - n^2 - m + n
General simplification [src]
     2        2
n + m  - m - n 
$$m^{2} - m - n^{2} + n$$
n + m^2 - m - n^2
Factorization [src]
(m - n)*(m + -1 + n)
$$\left(m - n\right) \left(m + \left(n - 1\right)\right)$$
(m - n)*(m - 1 + n)
Numerical answer [src]
n + m^2 - m - n^2
n + m^2 - m - n^2
Combinatorics [src]
(m - n)*(-1 + m + n)
$$\left(m - n\right) \left(m + n - 1\right)$$
(m - n)*(-1 + m + n)
Powers [src]
     2        2
n + m  - m - n 
$$m^{2} - m - n^{2} + n$$
n + m^2 - m - n^2
Assemble expression [src]
     2        2
n + m  - m - n 
$$m^{2} - m - n^{2} + n$$
n + m^2 - m - n^2
Common denominator [src]
     2        2
n + m  - m - n 
$$m^{2} - m - n^{2} + n$$
n + m^2 - m - n^2
Trigonometric part [src]
     2        2
n + m  - m - n 
$$m^{2} - m - n^{2} + n$$
n + m^2 - m - n^2
Combining rational expressions [src]
     2        2
n + m  - m - n 
$$m^{2} - m - n^{2} + n$$
n + m^2 - m - n^2
Rational denominator [src]
     2        2
n + m  - m - n 
$$m^{2} - m - n^{2} + n$$
n + m^2 - m - n^2