| 3x2 −9x | 12 | |||
1) | − | = 3 | ||
| 2 | x2 − 3x |
| x+9 | x+5 | x−1 | ||||
2) | − | = | ||||
| x2+x−12 | x2−x−6 | x2−9 |
| x+9 | x+5 | x−1 | |||
− | − | = 0 | |||
| (x−3)(x+4) | (x−3)(x+2) | (x−3)(x+3) |
| (x+9)(x+2)(x+3) − (x+5)(x+3)(x+4)− (x−1)(x+2)(x+4) | |
= 0 | |
| (x+4)(x+2)(x+3)(x−3) |
| −x3−3x2+2x+2 | |
= 0 | |
| (x+4)(x+2)(x+3)(x−3) |
| (x−1)(x−2−√2)(x+2−2√2) | |
= 0 | |
| (x+4)(x+2)(x+3)(x−3) |