express (2+sqrt3)(5-2sqrt3) in the form a+bsqrtc.

the answer is 4+sqrt3.

can someone teach me how to get it ?

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- Jun 3rd 2006, 10:28 PM #1

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- Jun 3rd 2006, 11:00 PM #2

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- Jun 4th 2006, 04:42 AM #3