x(x+9) |
x(x+3) |
(x+3)(x−3) |
(x+3)2 |
x+9 |
x+3 |
x−3 |
x+3 |
2(x+3) |
x+3 |
(2)原式=-
x−2 |
x−1 |
x2−4 |
x−1 |
x−2 |
x−1 |
x−1 |
(x+2)(x−2) |
1 |
x+2 |
x2+9x |
x2+3x |
x2−9 |
x2+6x+9 |
2−x |
x−1 |
3 |
x−1 |
x(x+9) |
x(x+3) |
(x+3)(x−3) |
(x+3)2 |
x+9 |
x+3 |
x−3 |
x+3 |
2(x+3) |
x+3 |
x−2 |
x−1 |
x2−4 |
x−1 |
x−2 |
x−1 |
x−1 |
(x+2)(x−2) |
1 |
x+2 |