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热心网友 时间:2023-06-19 12:46
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X^3+4X^2-7X-10
锛坸3-2x2锛?6x2-7x-10
=x2(x-2)+(6x+5)(x-2)
=(x-2)(x2+6x+5)
=(x-2)(x+1)(x+5)
濡傛灉 X^3+4X^2-7X-10 =0
閭d箞x=-1,x=-5,x=2