Question

преобразуйте в многочлен (3y+4z)^2-8z(3y-2z)

Answer 1

Вот: (3y+4z)²-8z(3y-2z)= 9y² + 24yz + 16z² - 24zy + 16z² = 9y² + 32z²

Answer 2

$(3y+4z)^{2}-8z(3y-2z)=9y^{2}+24yz+16z^{2}-24yz+16z^{2}=9y^{2}+(24yz-24yz)+(16z^{2}+16z^{2})=9y^{2}+32z^{2}$