select the correct answer from each drop - down menu. simplify. $sqrt{63}$

Explanation:

Step1: Factorize 63

We know that $63 = 9\times7$. So, $\sqrt{63}=\sqrt{9\times7}$.

Step2: Use square - root property

According to the property $\sqrt{ab}=\sqrt{a}\times\sqrt{b}$ ($a = 9$, $b = 7$ and $a\geq0$, $b\geq0$), we have $\sqrt{9\times7}=\sqrt{9}\times\sqrt{7}$. Since $\sqrt{9}=3$, then $\sqrt{63}=3\sqrt{7}$.

Answer:

$3\sqrt{7}$