Answer :
Final answer:
To simplify the given expression, √20 + √80, find the square roots of 20 and 80 separately and add them together. The equivalent expression is 6√5.
Explanation:
To simplify the expression √20 + √80, we need to find the square roots of 20 and 80 separately and then add them together.
√20 = √(4 × 5) = 2√5
√80 = √(16 × 5) = 4√5
Now, adding these two results together, we have:
2√5 + 4√5 = 6√5
Therefore, the choice that is equivalent to the given expression is OC. 6√5.
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