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x^2-xy-4+2y因式分解
人气:233 ℃ 时间:2020-03-31 13:42:59
解答
x^2-xy-4+2y因式分解
= x^2-4+2y-xy
= (x+2) (x-2)+ y ( 2-x)
= (x+2) (x-2)- y (x-2)
= (x-y+2 ) (x-2 )
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