Question

ПОМОГИТЕ СРОЧНО 2 ЗАДАНИЕ!!!!!!!!!!

Answer 1

$frac{y^2-4z^2}{3z+6}*frac{z^2+4z+4}{5y+10z}=frac{(y-2z)(y+2z)}{3(z+2)}*frac{(z+2)^2}{5(y+2z)}=frac{(y-2z)}{3}*frac{(z+2)}{5}=frac{yz+2y-2z^2-4z}{15}$