化简:【(x²-1)分之(3x+4)-(x-1)分之2】÷(x²-2x+1)分之(x+2)

问题描述:

化简:【(x²-1)分之(3x+4)-(x-1)分之2】÷(x²-2x+1)分之(x+2)
1个回答 分类:数学 2014-11-02

问题解答:

我来补答
[(3x+4)/(x²-1)-2/(x-1)]÷(x+2)/(x²-2x+1)
=[(3x+4)/(x²-1)-2(x+1)/(x²-1)]÷(x+2)/(x-1)²
=(x-2)/(x²-1)÷(x+2)/(x-1)²
=(x-1)(x-2)/(x+1)(x+2)
 
 
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