SOLUTION: Can you please help me subtract and simplify by collecting like radical terms, if possible? a 3sqrt 7 - 2 3sqrt 7 = Thanks

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Question 347897: Can you please help me subtract and simplify by collecting like radical terms, if possible?
a 3sqrt 7 - 2 3sqrt 7 =
Thanks
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
(3sqrt(7)) - 2*(3sqrt(7))
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Factor:
(3sqrt(7)(1-2)
=(3sqrt(7))(-1)
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= -3sqrt(7)
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Cheers,
Stan H.
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