作业帮计算.(x^2-y^2/2x^2+4xy+2y^2)*(2x+2y/x^2-xy)^2
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计算.(x^2-y^2/2x^2+4xy+2y^2)*(2x+2y/x^2-xy)^2
计算.(x^2-y^2/2x^2+4xy+2y^2)*(2x+2y/x^2-xy)^2
计算.(x^2-y^2/2x^2+4xy+2y^2)*(2x+2y/x^2-xy)^2
(x^2-y^2)/(2x^2+4xy+2y^2)*(2x+2y)/(x^2-xy)^2
=(x^2-y^2)/[2(x^2+2xy+y^2)]*2(x+y)/[x^2(x-y)^2 ]
=(x-y)(x+y)/[2(x+y)]^2*2(x+y)/[x^2(x-y)^2 ]
=(x-y)(x+y)/(x+y)*1/[x^2(x-y)^2 ]
=(x-y)/[x^2(x-y)^2 ]
=1/[x^2(x-y)]