| 10+√2 | |
Rozpisze ktoś mi dokładnie jak to skrócić, ma wyjść 4−√2 | |
| 3+√2 |
| 10+√2 | 3−√2 | ||
* | = | ||
| 3+√2 | 3−√2 |
| (10+√2)*(3−√2) | ||
= | = | |
| 32−√22 |
| 30−10√2+3√2−2 | ||
= | = | |
| 9−2 |
| 28−7√2 | 7*(4−√2) | |||
= | = | =4−√2 | ||
| 7 | 7 |
| (10+√2)(3−√2) | 30 − 10√2 + 3√2 − 2 | 28−7√2 | |||
= | = | = | |||
| (3+√2)(3−√2) | 7 | 7 |
| 7(4−√2) | ||
= 4 − √2  | ||
| 7 |