Question

8.4 add, subtract, and multiply radical expressions score: 1.8/22 answered: 2/22 question 3 simplify. 5\sqrt{7}-2\sqrt{7}= question help: video written example submit question jump to answer

Explanation:

Step1: Combine like - terms

Since the radicals $\sqrt{7}$ are the same, we can subtract the coefficients.
$5\sqrt{7}-2\sqrt{7}=(5 - 2)\sqrt{7}$

Step2: Calculate the coefficient

$5-2 = 3$, so $(5 - 2)\sqrt{7}=3\sqrt{7}$

Answer:

$3\sqrt{7}$