| √3−1 | 9− 5√3 | |||
Wykaż, że | = 3√ | Bardzo prosze o pomoc ![]() | ||
| √3 +1 | 9+5√3 |
| 9−5√3 | 9−5√3 | |||
b3 = (3√ | )3 = | = | ||
| 9+5√3 | 9+5√3 |
| 9−5√3 | 9−5√3 | (9−5√3)2 | ||||
= | • | = | = | |||
| 9+5√3 | 9−5√3 | 92 − (5√3)2 |
| 81 − 90√3 + 75 | 156−90√3 | |||
= | = | = 26−15√3 | ||
| 81−75 | 6 |
| √3−1 | (√3−1)2 | 4−2√3 | ||||
a3 = ( | )3 = ( | )3 = ( | )3 = (2−√3)3 = | |||
| √3+1 | 3−1 | 2 |