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X3-X2-X+1=0怎么进行因式分解啊?
人气:255 ℃ 时间:2020-05-11 22:26:20
解答
X3-X-(X2-1)
=x(x2-1)-(x2-1)
=(x2-1)(x-1)
=(x+1)(x-1))(x-1)
=(x+1)(x-1)²
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