Question

What is the following sum? 4√5+2√5 a. 6√10 b. 8√10 c. 6√5 d. 8√5

Answer 1

Since the radicands (the number under the radical) are the same, add the coefficients and keep the radicand.
4√5 + 2√5 = 6√5
LETTER C

Answer 2

For this case we have the following expression:

`4 \sqrt {5} +2 \sqrt {5}`

We can rewrite the expression by taking a common factor.

We have then:

`\sqrt {5} (4 + 2)`

From here, add the expression within the parenthesis we have:

`6 \sqrt {5}`

Answer:

The equivalent expression for
`4 \sqrt {5} +2 \sqrt {5}` is given by:

`6 \sqrt {5}`

Option C