Нужна срочная помощь

Question

Нужна срочная помощь

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Answer 1

1)(x³+y³)/(x²-xy+y²) : (x+y)/4=(x+3)(x²-xy+y²).4/(x²-xy+y²)(x+y)=
=4(x+3)/(x+y),    x≠-y

Answer 2

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