因式分解:(1)x²+x (2)4x²-9y (3)x²y-4y
2x²-8
人气:126 ℃ 时间:2019-08-19 12:07:45
解答
(1) x(x+1)
(2) (2x-3y)(2x+3y)
(3) (x+2)(x-2)y
2(x+2)(x-2)
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