Question

Simplify Expressions with Square Roots:

$\sqrt{-9}$

Short answer

The required answer is$3\sqrt{-1}$.

Step-by-step solution

Step 1. Given information. 

The given square root is$\sqrt{-9}$.

Step 2. Simplify the given root.  

$\sqrt{-9}$

Factor the number.

$$\begin{gathered} =\sqrt{-1}\sqrt{3^2} \\ =3\sqrt{-1} \end{gathered}$$