# How do you simplify 9 sqrt 5 -4 sqrt 7?

Mar 27, 2018

This can't be simplified any further....

#### Explanation:

Unless, you are looking for a decimal answer, then it would be:

$9 \sqrt{5} - 4 \sqrt{7}$

$= 20.1246 \ldots - 10.58300 \ldots$

$= 9.5416 \ldots .$

$\cong 9.54$