1) $\frac{1}{3}xy-2y^2+\frac{2}{3}xy-y^2+xy$; 2) $mn-\frac{2}{5}m^2+3mn-\frac{3}{5}m^2+2m^2$.

Question

Вопрос: $Фото задания: 1) $\frac{1}{3}xy-2y^2+\frac{2}{3}xy-y^2+xy$; 2) $mn-\frac{2}{5}m^2+3mn-\frac{3}{5}m^2+2m^2$.$ Фото задания

Accepted Answer

Ответ: 1) $2xy-3y^2$; 2) $m^2+4mn$.

1) \(\frac{1}{3}xy-2y^2+\frac{2}{3}xy-y^2+xy\); 2) \(mn-\frac{2}{5}m^2+3mn-\frac{3}{5}m^2+2m^2\).