3-1提公因式做因式分解

3-1提公因式做因式分解

班級:_____姓名:_____座號:______得分:______

因式分解下列各式 :

1 -x²-4x

2. -(x+5)(x-5)-(x-5)

3.(5x-8)²-8(5x-8)

4. (2x+3)(x-4)-(4-x)(5x-1)

5.(3-x)³-5(x-3)²

6. (x-1)2+3x-3

7.(x-5)(2x-y)+(y-2x)(5-x)

8. xz+xy-y²-yz

9. a²-ab-2a+b+1

10.(a+b+1)(a+1)+b-1