Question

como racionalizar denominador​

Answer 1

Resposta:

Explicação passo-a-passo:

$a) \frac{3}{\sqrt{5}}*\frac{\sqrt{5}}{\sqrt{5}}=\frac{3\sqrt{5}}{(\sqrt{5})^2}=\frac{3\sqrt{5}}{5}\\\\\\b)\frac{4}{3\sqrt{3}}*\frac{\sqrt{3}}{\sqrt{3}}=\frac{4\sqrt{3}}{3*(\sqrt{3})^2}=\frac{4\sqrt{3}}{3*3}=\frac{4\sqrt{3}}{9}$

c) 4/2√7

$\frac{4}{2\sqrt{7}}*\frac{\sqrt{7}}{\sqrt{7}}=\frac{4\sqrt{7}}{2(\sqrt{7})^2}=\frac{4\sqrt{7}}{2*7}}=\frac{4\sqrt{7}}{14}$