Question

relacione o denominador da expressão 2 sobre 3 raiz de 5

Answer 1

$\mathsf{\dfrac{2}{3+\sqrt{5}}=\dfrac{2}{(3+\sqrt{5})}.\dfrac{(3-\sqrt{5})}{(3-\sqrt{5})}}\\\mathsf{\dfrac{2(3-\sqrt{5})}{3^2-(\sqrt{5})^2}}\\\mathsf{\dfrac{2(3-\sqrt{5})}{9-5}=\dfrac{2(3-\sqrt{5})}{4}}$

$\large\boxed{\boxed{\boxed{\boxed {\mathsf{\dfrac{3-\sqrt{5}}{2}}}}}}$