麻烦你们团队了:计算:1、(6xy^2-12x^3y^4+2x^2y^2)/(-2xy^2) 2、8(x-y)^4(x+y)^3/27[(x+y)(x-y)]^3
问题描述:
麻烦你们团队了:计算:1、(6xy^2-12x^3y^4+2x^2y^2)/(-2xy^2) 2、8(x-y)^4(x+y)^3/27[(x+y)(x-y)]^3
答
原式=-3+6x^2y^2-x
原式=8(x-y)(x^2-y^2)^3/27[x^2-y^2]^3
=8(x-y)/27
=8/27x-8/27y