Question

Racionalize as frações
a) 1/√x
b) 2/√x+√4

Answer 1

a)

$\frac{1}{\sqrt{x}}\times\frac{\sqrt{x}}{\sqrt{x}}=\frac{\sqrt{x}}{x} \ \ \ x\neq0$

b)

$\frac{2}{\sqrt{x}+\sqrt{4}}=\frac{2}{\sqrt{x}+2} \times \frac{\sqrt{x}-2}{\sqrt{x}-2}=\frac{2\sqrt{x}-4}{x-4} \ \ \ x\neq4$