SOLUTION: help! {{{x sqrt 18 - 3 sqrt 8x^2}}} Please show steps, I don't understand!

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Question 39893: help!
x+sqrt+18+-+3+sqrt+8x%5E2
Please show steps, I don't understand!
Found 2 solutions by fractalier, checkley71:
Answer by fractalier(6550) About Me  (Show Source):
You can put this solution on YOUR website!
Okay, from
x sqrt(18) - 3 sqrt(8x^2)
The idea is to factor the roots out into perfect squares and what's left over, for example sqrt(18) = sqrt(9)*sqrt(2) = 3*sqrt(2)...
Also sqrt(8x^2) = sqrt(4x^2)*sqrt(2) = 2x*sqrt(2)
So if we put it together, we have
x sqrt(18) - 3 sqrt(8x^2) =
3x*sqrt(2) - 6x*sqrt(2) =
-3x*sqrt(2)

Answer by checkley71(8403) About Me  (Show Source):
You can put this solution on YOUR website!
XSQRT18-3SQRT8X~2 OR 3XSQRT2-6XSQRT2 OR (3X-6X)SQRT2 OR -3XSQRT2