Question 42816
7 square root of 48x Cubed subtract 8x square root of 108x.

7sqrt(48x^3) - 8xsqrt(108x)

=7*4xsqrt(3x) - 8x*6sqrt(3x)
=28xsqrt(3x) - 48xsqrt(3x)
 =-20xsqrt(3x)

Cheers,
Stan H.