SOLUTION: Can you help me please. Simplify by adding or subtracting. Radical 13 + 3 radical 13 - 9 radical 13

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Question 1063109: Can you help me please. Simplify by adding or subtracting. Radical 13 + 3 radical 13 - 9 radical 13
Found 2 solutions by ikleyn, stanbon:
Answer by ikleyn(52781) About Me  (Show Source):
You can put this solution on YOUR website!
.
= - 5 radical (13).

= - 5*sqrt(13).

= -5%2Asqrt%2813%29.


Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Simplify by adding or subtracting. Radical 13 + 3 radical 13 - 9 radical 13
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sqrt(13) + 3*sqrt(13) - 9*sqrt(13) = (1+3-9)sqrt(13) = -5*sqrt(13)
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Cheers,
Stan H.
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