| 13√5 − 45 | |
| √5 − 3 |
| 13√5 − 45 | √5 + 3 | |
= | ||
| √5 − 3 | √5 + 3 |
| (13√5 − 45)(√5 + 3) | |
= | |
| (√5)2 − 32 |
| 13*5 − 45√5 + 39√5 − 135 | |
= | |
| 5 − 9 |
| 65 − 135 − 6√5 | |
= | |
| −4 |
| −(6√5 + 70) | |
= | |
| −4 |
| 6√5 + 70 | |
= | |
| 4 |
| 2(3√5 + 35) | |
= | |
| 4 |
| 3√5 + 35 | |
| 2 |
| 13√5−45 | √5+3 | 13*5+39√5−45√5−135 | 6√5+70 | ||||
* | = | = | = | ||||
| √5−3 | √5+3 | 5−9 | 4 |
| 3√5+35 | ||
= | ||
| 2 |