(y^2-2y)^2-y^2(y+3)(y-3)+2y(2y^2+5)

Question

(y^2-2y)^2-y^2(y+3)(y-3)+2y(2y^2+5)

Answer 1

Решение во вложении :)

Answer 2

( у^2 - 2у )^2 - y^2( y + 3 )( y - 3 ) + 2y( 2y^2 + 5 ) = y^4 - 4y^3 + 4y^2 - y^2( y^2 - 9 ) + 4y^3 + 10y = y^4 + 4y^2 + 10y - y^4 + 9y^2 = 4y^2 + 10y + 9y^2 = 13y^2 + 10y