分解因式:xy(xy+1)+(xy+3)-2(x+y+12)-(x+y-1)2.
题型:解答题难度:一般来源:不详
分解因式:xy(xy+1)+(xy+3)-2(x+y+)-(x+y-1)2. |
答案
原式=(xy)2+2xy+3-2(x+y)-1-(x+y)2+2(x+y)-1, =(xy)2+2xy+1-(x+y)2, =(xy+1)2-(x+y)2, =(xy+1+x+y)(xy+1-x-y), =(x+1)(y+1)(x-1)(y-1). |
举一反三
把多项式x3-3x2+(a+2)x-2a分解因式. |
因式分 (1)6q(2p+3q)+4p(3q+2p); (2)(x2+x)2-(x+1)2. |
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