因式分解 2x^2+xy-y^2+x-5y-6
人气:469 ℃ 时间:2019-10-11 06:00:23
解答
2x^2+xy-y^2+x-5y-6
=2x^2+(y+1)x-(y^2+5y+6)
=2x^2+(y+1)x-(y+2)(y+3)
=(2x-y-3)(x+y+2)
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