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因式分解:xy+y^2+x-y-2
题目详情
因式分解:xy+y^2+x-y-2
▼优质解答
答案和解析
xy+y^2+x-y-2
=(xy+x)+(y^2-y-2)
=x(y+1)+(y-2)(y+1)
=(y+1)(x+y-2)
=(xy+x)+(y^2-y-2)
=x(y+1)+(y-2)(y+1)
=(y+1)(x+y-2)
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