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因式分解x^4-11x^2+1
还有一道 (x+1)(x+2)(x+3)-24
(x+1)(x+2)(x+3)-24没有(x+4)
人气:230 ℃ 时间:2020-05-01 16:22:15
解答
x^4-11x^2+1
=(x^4-2x^2+1)-9x^2
=(x^2-1)^2-(3x)^2
=(x^2+3x-1)(x^2-3x-1)
(x+1)(x+2)(x+3)-24
=x^3+6x^2+11x+6-24
=x^3+6x^2+11x-18
=(x-1)(x^2+7x+18)
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