Question

add. write your answer in simplest form. 9\sqrt{7}+2\sqrt{7}

Explanation:

Step1: Combine like - terms

Since both terms have the same radical part $\sqrt{7}$, we can add the coefficients. The coefficients are 9 and 2.
$9\sqrt{7}+2\sqrt{7}=(9 + 2)\sqrt{7}$

Step2: Calculate the sum of coefficients

$9+2 = 11$
So, $(9 + 2)\sqrt{7}=11\sqrt{7}$

Answer:

$11\sqrt{7}$