初一年级 提取公因式法（2）

1. a (x-4) (y+3) + b (4-x )(3+y) = (x-4) (y+3) ( )

2. 将 x (x+y) (x-y) - x (x+y)^2 分解因式得________________

3. (x+y)^3 - y(x+y)^2 + x^2(y+x) = ( ) (2x+y)

4. -35x (x+y) - 42 (x+y) = ( ) (x+y) ( )

将下列各式因式分解

5. m(a-b)(x+y) - n(b-a)(y+x)

6. x(x-y-z) + y(z-x+y) - z(y-x+z)

1 a-b

2 -2xy(x+y)

3 x(x+y)

4 -7 5+6

5 (a-b)(x+y)(m+n)

6 (-x+y-z)²=（x-y+z)²