阅读下面例题:把多项式x2-2xy+y2-2x+2y+1因式分解.解:原式=(x-y)2-2(x-y)+1=(x-y-1)2依照上述方
阅读下面例题:把多项式x2-2xy+y2-2x+2y+1因式分解.解:原式=(x-y)2-2(x-y)+1=(x-y-1)2依照上述方法因式分解:x2+2xy+y2+4x...
阅读下面例题:把多项式x2-2xy+y2-2x+2y+1因式分解.解:原式=(x-y)2-2(x-y)+1=(x-y-1)2依照上述方法因式分解:x2+2xy+y2+4x+4y+4=______.
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