化简x2+2x+1分之x2-y2÷x+1分之x-y
问题描述:
化简x2+2x+1分之x2-y2÷x+1分之x-y
答
(x ² + 2 x + 1) / (x ² - y ²)÷ (x + 1)/ (x - y)
= (x + 1)² / (x + y)(x - y)× (x - y)/ (x + 1)
= (x + 1)/ (x + y)
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