3-√2
-----= wynik ma byc: 3√2-2
√2 ------
2
3-√2 (3 - √2 ) * √2 3√2 - 2
-----= ------------------- = -------------- =
√2 √2 * √2 2
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3-√2 (3 - √2 ) * √2 3√2 - 2
-----= ------------------- = -------------- =
√2 √2 * √2 2