因式分解:1.(a²-b²)-(a-b)-2 2.(a+b)²+(a+b)-61.(a²-b²)-(a-b)-2 2.(a+b)²+(a+b)-6
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因式分解:1.(a²-b²)-(a-b)-2 2.(a+b)²+(a+b)-61.(a²-b²)-(a-b)-2 2.(a+b)²+(a+b)-6
因式分解:1.(a²-b²)-(a-b)-2 2.(a+b)²+(a+b)-6
1.(a²-b²)-(a-b)-2 2.(a+b)²+(a+b)-6
因式分解:1.(a²-b²)-(a-b)-2 2.(a+b)²+(a+b)-61.(a²-b²)-(a-b)-2 2.(a+b)²+(a+b)-6
1:=(a-b)(a+b)-(a-b)-2=(a-b)(a+b-1)-2
2:=(a+b)(a+b+1)-6
1.无法因式分解,因式分解是把一个多项式写成几个整式乘积的形式
2.=(a+b+3)(a+b-2)
1=(a+b)(a-b)-(a-b)-2=(a-2)(a-1)-b(b+1)
2将(a+b)看做一个整体A =A²+A-6=(A-3)(A+2)=(a+b-3)(a+b+2)