Question

1/ root 9 + root 8 = ???...

Answer 1

$\frac{1}{ \sqrt{9} } + \sqrt{8} \\ \frac{1}{ \sqrt{3 \times 3} } + \sqrt{2 \times 2 \times 2 } \\ = \frac{1}{3} + 2 \sqrt{2} = \frac{1 + 6 \sqrt{2} }{3}$

Hope this will be helpful.

Answer 2

$\huge\fbox\color{red}{❥Here\:is\:ur\:answer}$

$\frac{1}{ \sqrt{9} + \sqrt{8} }$

$\underline {rationalise}$

$= \frac{1}{ \sqrt{9} + \sqrt{8} } \times \frac{ \sqrt{9} - \sqrt{8} }{ \sqrt{9} - \sqrt{8} }$

$= \frac{ \sqrt{9} - \sqrt{8} }{9 - 8}$

$= \sqrt{9} - \sqrt{8}$

$= 3 - \sqrt{8}$

$\huge\color{pink}{Hope\:it\:helps\:you...}$