Question

Simplify the radical expression 3√(5) + 6√(45)

A) 9√(50
B) 21√(10)
C) 6√(96)
D) 21√(5)

Answer 1

D) 21√(5)

Explanation:

Pull terms out from under the radical, assuming positive real numbers.

Answer 2

Simplify
`6 √(45)`, as there is 9 as a factor. The new form is
`18 √(5) .`

Then, add 18 and 3 to get
`21 √(5)`
The correct answer is B.