Question

упоростите выражение:Дам 100балов срочно Пж​

Answer 1

Ответ:

$\frac{xy}{x + y}$

Answer 2

$\frac{x^{2}-y^{2}}{x-y}-\frac{x^{3}-y^{3}}{x^{2}-y^{2}}=\frac{(x+y)(x^{2}-y^{2})-(x^{3}-y^{3} )}{x^{2}-y^{2}}=\frac{x^{3}-xy^{2}+yx^{2}-y^{3}-x^{3}+y^{3}}{x^{2}-y^{2}}=\frac{yx^{2}-xy^{2}}{x^{2}-y^{2}}=\frac{xy(x-y)}{(x-y)(x+y)}=\frac{xy}{x+y}$