Question 456789
I'm having difficulty solving the following equation and don't understand the order to solve: 
(3sqrt(5) - 2 sqrt(10))((2sqrt(5) + sqrt(10))
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Use FOIL:

F: 6*5
O: 3sqrt(50)
I: -4sqrt(50)
L: -2*10
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Combine:
10 -sqrt(50)
= 10-5Sqrt(2)
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Cheers,
Stan H.
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