Question

ДАМ 50 БАЛЛОВ
Помогите с 4 заданием

Answer 1

$(7xy^2- \frac{11x^2y^4}{2xy^2})^2:(9xy)=\\\\=(\frac{7xy^2*2xy^2-11x^2y^4}{2xy^2})^2:(9xy)=\\\\=(\frac{14x^2y^4-11x^2y^4}{2xy^2})^2:(9xy)=\\\\=(\frac{3x^2y^4}{2xy^2})^2:(9xy)=\\\\=(\frac{3xy^2}{2})^2:(9xy)=\\\\=\frac{9x^2y^4}{4}:(9xy)=\\\\=\frac{9x^2y^4}{4*9xy}=\frac{xy^3}{4}=0,25xy^3$