问题描述： 数学题7-8 1个回答 分类：数学 2014-12-13 问题解答： 我来补答 7.(x^2+4x+4-x^2+4x-4)/x=8x/x=88(1)9y/12x^2y^4z 10xz/12x^2y^4z (2) (x^2-y^2)/(x+y) (x-y)/(x+y)(3) (x-1)^2/(x+1)^2(x-1) 2(x+1)/(x+1)^2(x-1)(4) (x+4)^2/(x-3)(x+4)(x-5) (x+5)(x-5)/(x-3)(x+4)(x-5) (x-3)^2/(x-3)(x+4)(x-5) 展开全文阅读
