Question

8.4 add, subtract, and multiply radical expressions
score: 2.8/22 answered: 3/22
question 4
simplify.
4\sqrt{c}+5\sqrt{c}=
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Explanation:

Step1: Combine like - terms

Since both $4\sqrt{c}$ and $5\sqrt{c}$ have the same radical part $\sqrt{c}$, we can add their coefficients.
$4\sqrt{c}+5\sqrt{c}=(4 + 5)\sqrt{c}$

Step2: Calculate the sum of coefficients

$4+5 = 9$
So, $(4 + 5)\sqrt{c}=9\sqrt{c}$

Answer:

$9\sqrt{c}$