SOLUTION: please help me solve this equation {{{ -9 sqrt(2)- 9 sqrt (8)}}}

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Question 634267: please help me solve this equation +-9+sqrt%282%29-+9+sqrt+%288%29
Found 2 solutions by stanbon, lynnlo:
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
-9 sqrt(2)- 9 sqrt (8)
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= -9sqrt(2) - 9*2sqrt(2)
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= -9sqrt(2) - 18sqrt(2)
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= -27sqrt(2)
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Cheers,
Stan H.

Answer by lynnlo(4176) About Me  (Show Source):
You can put this solution on YOUR website!
are you writing -9√(2)-9√(8)
did i write your problem down right