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数学
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x^3-6x^2+9x-4和5x^2+9x-4这类问题如何分解呀!谢谢
以前学过的都忘记了,麻烦大家给我上一课,要具体解题步骤!谢谢
人气:490 ℃ 时间:2020-04-08 00:47:07
解答
x^3-6x^2+9x-4
=(x^3-4x^2)-(2x^2-8x)+(x-4)
=(x^2-2x+1)(x-4)
=(x-1)^2*(x-4)
5x^2+9x+4
=(5x+4)(x+1)
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