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因式分解x^3-7x+6
人气:304 ℃ 时间:2020-01-26 12:50:12
解答
x^3-7x+6
=x³-x-6x+6
=x(x²-1)-6(x-1)
=x(x-1)(x+1)-6(x-1)
=(x-1)(x²+x-6)
=(x-1)(x-2)(x+3)
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