Question

Racionalize:
f)
$\frac{6}{ \sqrt{a} + 1 } =$
​

Answer 1

$\frac{6}{ \sqrt{a} + 1 } \times \frac{ \sqrt{a} - 1}{\sqrt{a} - 1} = \frac{6( \sqrt{a} - 1) }{a - 1} = \frac{6 \sqrt{a} - 6}{a - 1}$