来源：学生作业帮 编辑：作业帮 分类：数学作业 时间：2024/09/14 02:21:36
数学题7-8
7.(x^2+4x+4-x^2+4x-4)/x=8x/x=8
8(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)
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