因式分解:2x*x+xy-3y*y+x+14y-15
2个回答
原式=(2x+3y)(x-y)+x+14y-15
=(2x+3y)(x-y)+3(2x+3y)-5x+5y-15
=(2x+3y)(x-y+3)-5(x-y+3)
=(2x+3y-5)(x-y+3)
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