Question

Otvette пж пж пж пж очень срочно

Answer 1

$1)49m^2(n+8m)^2=49m^2(n^2+16mn+64m^2)=49m^2n^2+784m^3+$
$+3136m^4.$
$2) (5x-3y)^2-16x^2=25x^2-xy+9y^2+16x^2=41x^2-30xy+9y^2$