Question 179813
[18x^3 times [2x^2y^3 

= sqrt(18x^3) * sqrt(2x^2y^3)

= 3xsqrt(2x) * xysqrt(2y)

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

= 3x^2y*2sqrt(xy)

= 6x^2y^2*sqrt(xy)

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Cheers,
Stan H.