Question

(-a-b)^2 алгебра 7 класс​

Answer 1

$( - a - b) {}^{2} \\ ( - a) {}^{2} - 2 \times ( - a)b + b {}^{2} \\ a {}^{2} + 2ab + b{}^{2}$

~•~•~•ZLOY_TIGROVSKIY~•~•~•