Which expression is equivalent to square root of 120 x ?
Answer
A
2 square root of 30
B
60 square root of 2 x
C
4 square root of 30 x
D
2 square root of 30 x
Explanation
Factor 120 as 4 × 30, then take the square root of the perfect square: √(120x) = √4 × √(30x) = 2√(30x). So the equivalent expression is 2√(30x), choice D.
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