Question

va rog este urgent!!!!​

Answer 1

$\small( \sqrt{2} - \frac{1}{2} ) {}^{2} + ( \frac{ \sqrt{2} }{2} + 1) {}^{2} + ( \frac{1}{2} - \sqrt{5} )( \frac{1}{2} + \sqrt{5} ) \\ = 2 - \sqrt{2} + \frac{1}{4} + \frac{2}{4} + \sqrt{2} + 1 + \frac{1}{4} - 5 \\ = - 2 + \frac{1}{4} + \frac{2}{4} + \frac{1}{4} \\ = - 2 + \frac{4}{4} \\ = - 2 + 1 \\ = - 1 \\ \iff \: \: adevarat$