
三道因式分解:(x+y)^2-(x+y)^3,(x-y)^2-(x-y)^3,(x-y)^2-(y
三道因式分解:(x+y)^2-(x+y)^3,(x-y)^2-(x-y)^3,(x-y)^2-(y-x)^3。要过程!...
三道因式分解:(x+y)^2-(x+y)^3,(x-y)^2-(x-y)^3,(x-y)^2-(y-x)^3。要过程!
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(x+y)^2-(x+y)^3
=(x+y)^2[1-(x+y)]
=(x+y)^2(1-x-y)
(x-y)^2-(x-y)^3
=(x-y)^2[1-(x-y)]
=(x-y)^2(1-x+y)
(x-y)^2-(y-x)^3
=(x-y)^2+(x-y)^3
=(x-y)^2[1+(x-y)]
=(x-y)^2(1+x-y)
=(x+y)^2[1-(x+y)]
=(x+y)^2(1-x-y)
(x-y)^2-(x-y)^3
=(x-y)^2[1-(x-y)]
=(x-y)^2(1-x+y)
(x-y)^2-(y-x)^3
=(x-y)^2+(x-y)^3
=(x-y)^2[1+(x-y)]
=(x-y)^2(1+x-y)
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