SOLUTION: can someone explain to me how do simplify this by combining like terms when there is no like terms? xsqrt{{{18}}}-3sqrt{{{8x^2}}}

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Question 78462: can someone explain to me how do simplify this by combining like terms when there is no like terms?
xsqrt-3sqrt

Answer by stanbon(75887)   (Show Source): You can put this solution on YOUR website!
xsqrt18-3sqrt8x^2
=xsqrt(9*2) - 3sqrt(4x^2*2)
=3xsqrt2 - (2x)3sqrt2
=3xsqrt2 - 6xsqrt2
= -3xsqrt2
=============
Cheers,
Stan H.

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