Question

Упростить выражение:

2x/x-y + 7x^2/x^2-y^2

Answer 1

$frac{2x}{x-y} + frac{7x^2}{x^2-y^2}=frac{2x(x+y)}{(x-y)(x+y)} + frac{7x^2}{(x-y)(x+y)}=frac{2 x^{2} +2xy+7x^2}{(x-y)(x+y)}=frac{9 x^{2} +2xy}{(x-y)(x+y)}$

Answer 2

держи...................