Question

Simplify the radical expression below."TexFormula1" title="3 \sqrt{7} - \sqrt{63} " alt="3 \sqrt{7} - \sqrt{63} " align="absmiddle" class="latex-formula">

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.