Question

Rationalize the denominator of $\frac{3}{2\sqrt{7}}$.

Answer 1

$\frac{3}{2\sqrt{7}}=\frac{3}{2\sqrt{7}}\times \frac{\sqrt{7}}{\sqrt{7}}$

$=\frac{3\sqrt{7}}{2\times 7}$

$=\frac{3\sqrt{7}}{4}$.