Question 142304
The sqaure root of 12x^2y^3 - the sqaure root of 27x^4y.
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sqrt(12x^2y^3) - sqrt(27x^4y)

= sqrt(4x^2y^2 * 3y) - sqrt(9x^4 * 3y)

= 2xy sqrt(3y) - 4x^2 sqrt(3y)

Factor to get:
= (2xy - 4x^2)sqrt(3y)
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Cheers,
Stan H.