Respostas

2014-06-05T00:21:02-03:00
(3-√3)/(3+√3) = (3-√3)(3-√3) / (3+√3)(3-√3) = (3-√3)² / (3)² -(√3)² = (3-√3)² / 9 - 3 =

= (3-√3)² / 6 = (9 - 6√3 + 3) / 6 = (12 - 6√3) / 6 = 6(2 - √3) / 6 = 2-√3 

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