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八上因式分解题,
x²-xy-12y²=?m(x-y)²-x+y=?(都要有过程,)
人气:261 ℃ 时间:2020-04-11 07:42:48
解答
x²-xy-12y²=(x-4y)(x+3y)
m(x-y)²-x+y
=m(x-y)²-(x-y)
=(x-y)[m(x-y)-1]
=(x-y)(mx-my-1)
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