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}}}

Algebra ->  Radicals -> 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}}}      Log On


   

Question 78462: can someone explain to me how do simplify this by combining like terms when there is no like terms?
xsqrt18-3sqrt8x%5E2
Answer by stanbon(75887) About Me  (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
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Cheers,
Stan H.