Question

преобразуйте в многочлен -4y(y+2)+(y-5)²

Answer 1

-4y(y+2)+(y-5)² = -4у²-8у+у²+25-10у = 25-18у-3у²  

Answer 2

$-4y(y+2)+(y-5)^2=-4y^2-8y+y^2-10y+25=$

 

$=-3y^2-18y+25=-(3y^2+18y-25)$