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因式分解x3+x2+xy-xy2
人气:131 ℃ 时间:2020-04-04 10:49:48
解答
x^3+x^2+xy-xy^2
=x(x^2+x+y-y^2)
=x(x^2-y^2+x+y)
=x[(x+y)(x-y)+(x+y)]
=x(x+y)(x-y+1)
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