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9x^2-4y^2-3x+2y 因式分解
人气:497 ℃ 时间:2020-04-16 15:34:15
解答
9x^2-3x+1/4 -4y^2+2y-1/4
(3x-1/2)^2-(2y-1/2)^2
=(3x-1/2+2y-1/2)(3x-1/2-2y+1/2)
(3x+2y-1)(3x-2y)
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