Question

Ex 4 pls cu rezolvare
($\sqrt{5}$+2)($\sqrt{5}$-2)+($\sqrt{5}$-1)$^{2}$+2$\sqrt{5}$

Answer 1

$(5 - 2 \sqrt{5} + 2 \sqrt{5} - 4) + (5 - 2 \sqrt{5} + 1) + 2 \sqrt{5}$

$1 + 6 - 2 \sqrt{5} + 2 \sqrt{5}$

7