Question

rationalize denominator 1 by root 7 minus 2​

Answer 1

heya!

-----------------

$\frac{1}{ \sqrt{7} - 2}$

multiply with

$\frac{ \sqrt{7} + 2}{ \sqrt{7} + 2 }$

then

$= \frac{ \sqrt{7} + 2 }{ { \sqrt{7} }^{2} - {2}^{2} } = \frac{ \sqrt{7} + 2}{3}$

hope the answer helps