Question 331481
sqrt[8x^3] =

House into individual radicals and then simplify.

sqrt[8] = sqrt[4] * sqrt[2]

sqrt[4] * sqrt[2] = 2(sqrt[2])

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sqrt[x^2] * sqrt[x] = x(sqrt[x])

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We now have the following:

2(sqrt[2]) * x(sqrt[x]) = 

2x(sqrt[2x])