Question

Calculati cat este "a":

Answer 1

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Answer 2

$a = {(2 + \sqrt{2}) }^{2} - \sqrt{8} - \frac{1}{3 - 2 \sqrt{2} } \\ \\ a = 4 + 4 \sqrt{2} + 2 - 2 \sqrt{2} - (3 + 2 \sqrt{2}) \\ \\ a = 3 + 4 \sqrt{2} - 2 \sqrt{2} - 2 \sqrt{2} \\ \\ a = 3 + 0 \\ \\ a = 3$