Question

Simplify the radical expression below.

$3 \sqrt{7} - \sqrt{63}$

Answer 1

So for this, we can simplify √63 as such:

$\sqrt{63}=\sqrt{7*9}=3\sqrt{7}$

Using the simplified version of √63, we can solve it:

$3\sqrt{7} -3\sqrt{7} =0$

Zero is your final answer.