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数学
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因式分解,练习题
因式分解下列各式:
(1) 30-11x-30x^2
(2) 2(3x+1)^2-3(3x+1)(y-2)+(y-2)^2
人气:472 ℃ 时间:2020-02-06 04:03:47
解答
30-11x-30x^2
=-(30x²+11x-30)
=-(5x+6)(6x-5)
2(3x+1)^2-3(3x+1)(y-2)+(y-2)^2
=[2(3x+1)-(y-2)][(3x+1)-(y-2)]
=(6x-y+4)(3x-y+3)
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