Chapter 10 - Radical Expressions and Equations - 10-3 Operations With Radical Expressions - Practice and Problem-Solving Exercises - Page 629: 22

= $5\sqrt 3 -3 \sqrt 5$.

We can simplify the expression as follows: = $\sqrt 5(\sqrt 15 - 3)$ = $\sqrt 5((\sqrt 5*\sqrt 3) - \sqrt 3* \sqrt 3)$ = $\sqrt 5(\sqrt 3(\sqrt 5 -\sqrt 3))$ ( Taking out $\sqrt 3$) = $5\sqrt 3 -3 \sqrt 5$.