
x^2+xy-2y^2+3x+3y+2怎么因式分解
1个回答
2013-08-13
展开全部
我是朱尧辉噢,x^2+xy-2y^2+3x+3y+2=(x+2y)(x-y)+(x+2y)+2x+y+2
=(x+2y)(x-y+1)+x-y+1+x+2y+1
=(x+2y+1)(x-y+1)+x+2y+1
=(x+2y+1)(x-y+2)
=(x+2y)(x-y+1)+x-y+1+x+2y+1
=(x+2y+1)(x-y+1)+x+2y+1
=(x+2y+1)(x-y+2)
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