Question

Select all of the expression that are equivalent to 4√ 5

a. 2√ 20

b. 6^1/2 - 5^1/2

c. 3 * 5^1/2 + 5^1/2

d. 4 * 5^1/2

e. 2√ 10

f. 3*5^1/2

Answer 1

2√20 and 4*5^1/2. Explanation Below:

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When we simplify 2√20, we get 4√5, and 5^1/2 is √5. Therefore, 4*5^1/2 is 4√5.

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Hope this helps