SOLUTION: Please help me solve this by multiplying, then simplifying. (3-2sqrt3)^2

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Question 138273: Please help me solve this by multiplying, then simplifying.
(3-2sqrt3)^2
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
(3-2sqrt3)^2
(3-2sqrt(3))(3-2sqrt(3))
Use FOIL:
F: 3*3 = 9
O: 3*-2sqrt(3) = -6sqrt(3)
I: 3*-2sqrt(3) = -6sqrt(3)
L: -2sqrt(3)*-2sqrt(3) = 12
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Combine the terms to get
= 9+12 -12sqrt(3)
= 21 -12sqrt(3)
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Cheers,
Stan H.