Question

Знание раскрытие скобок:(x+y)×(y+x)=?
y(x+y)=?
yx×(x+y-x)=?​

Answer 1

(x+y)*(y+x)= x^2+2xy+y^2

y(x+y)=xy+y^2

yx*(x+y-x)=xy^2