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解
(x²-y²)(x+y)÷(x+y)²
=(x-y)(x+y)(x+y)÷(x+y)²
=(x-y)
选A
(x²-y²)(x+y)÷(x+y)²
=(x-y)(x+y)(x+y)÷(x+y)²
=(x-y)
选A
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展开全部
A
(x²-y²)=(x-y)(x+y)
故
(x²-y²)(x+y)÷(x+y)²
=x-y
(x²-y²)=(x-y)(x+y)
故
(x²-y²)(x+y)÷(x+y)²
=x-y
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