Question

Помогите решить !!!! даю 38 баллов

Answer 1

$x(1+y)-y(xy-1)-x^{2}y=x+xy-xy^{2}+y-x^{2}y$
$x+xy-xy^{2}+y-x^{2}y=x+y+xy-xy(x+y)=-p+q-q*(-p)$
$-p+q-q*(-p)=-p+q+q*p$

Answer 2

5)p+q+pq

Answer 3

точно?