Question

In the following exercise, simplify:$9\sqrt{7}-10\sqrt{7}$

Short answer

The solution is$-\sqrt{7}.$

Step-by-step solution

Step 1. Given information

Roots:$9\sqrt{7}-10\sqrt{7}$

Step 2. Calculation

We have,

$$\begin{gathered} 9\sqrt{7}-10\sqrt{7} \\ =-\sqrt{7} \end{gathered}$$

Since the radicals are like, we subtract the

coefficients.