Posted by **Anonymous** on Wednesday, July 4, 2007 at 4:45pm.

simplify by combining like terms:

x sqrt(18) - 3 sqrt(8x)sqrd

If <sqrt(8x)sqrd> means [sqrt(8x)]^2, then that also equals 8x. So

x sqrt(18) - 3 sqrt(8x)sqrd

= x[sqrt(9*2)-3*8]

= 3x(sqrt 2 -3