Упростите выражение!СРОЧНО!

Question

Упростите выражение!СРОЧНО!

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Answer 1

(x³+y³)/(x+y) :(x²-y²)=(x+y)(x²-xy+y²)/(x+y)(x²-y²)=(x²-xy+y²)/(x²-y²)
(x²-xy+y²)/(x²-y²) +2y/(x+y) -xy/(x²-y²)=(x²-xy+y²+2xy-2y²-xy)/(x²-y²)=(x²-y²)/(x²-y²)=1