问题 填空题

分解因式:x13-2x12x2-x1+2x2=______.

答案

x13-2x12x2-x1+2x2

=(x13-2x12x2)-(x1-2x2),

=x12(x1-2x2)-(x1-2x2),

=(x1-2x2)(x12-1),

=(x1-2x2)(x1+1)(x1-1).

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