分解因式m(x²-2xy+y²)-x+y
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分解因式m(x²-2xy+y²)-x+y
分解因式m(x²-2xy+y²)-x+y
分解因式m(x²-2xy+y²)-x+y
m(x²-2xy+y²)-x+y
=m(x-y)²-(x-y)
=[m(x-y)-1](x-y)
=(mx-my-1)(x-y)
原式=m(x-y)²-(x-y)
=(x-y)(mx-my-1)