Question

X(в квадраті)-m(m+n)-n(m+n)

Answer 1

Ответ:

$x^{2} - m(m+n)-n(m+n);\\x^{2} -m^{2} -2mn-n^{2}.$

Объяснение:

Answer 2

It seems like you've provided an algebraic expression: $X^2 - m(m+n) - n(m+n)$. If you have a specific question or if you'd like to simplify or factorize this expression, please let me know, and I'll be happy to help!