Question

a questão e a 120 por favor se puder ajudem

Answer 1

a resposta é a letra = A

Answer 2

Boa tarde!

$\dfrac{\sqrt{2-\sqrt3}}{\sqrt{2+\sqrt3}} \ \cdot \dfrac{\sqrt{2+\sqrt3}}{\sqrt{2+\sqrt3}} \\ \\ \\ = \dfrac{\sqrt{2^2-(\sqrt3)^2}}{\sqrt{(2+\sqrt3)^2}} = \dfrac{\sqrt{4-3}}{2+\sqrt3}} \cdot\dfrac{2-\sqrt3}{2-\sqrt3}\\ \\ \\ \dfrac{2-\sqrt3}{2^2-(\sqrt3)^2}=\dfrac{2-\sqrt3}{4-3}\boxed{=2-\sqrt3}$

Alternativa 'E'