Question

Разложите на множители 4а^3 b^2(x-y)-18ab^4(y-x)

Answer 1

$4a^3 b^2(x-y)-18ab^4(y-x)=4a^3 b^2(x-y)+18ab^4(x-y)$$=2ab^2(x-y)(2a^2+9b^2)$