Which choice is equivalent to the expression below when x > 0

Answer:
3x sqrt(2x)
Step-by-step explanation:
sqrt(6x^2) * sqrt(3x)
We know that sqrt(a) sqrt(b) = sqrt(ab)
sqrt(6x^2*3x)
sqrt(18x^3)
sqrt(9*2 x^2 x)
sqrt(a) sqrt(b) = sqrt(ab)
sqrt(9) sqrt(x^2) sqrt(2x)
3x sqrt(2x)