Respostas

2013-11-09T16:08:56-02:00
A) (raiz de 3+1)^2
     3+1= 4

b)
(( \sqrt{7} +2).( \sqrt{7}-2)
 \sqrt{49} -4
7-4
3

c)
 \sqrt{6}. \sqrt{3} /  \sqrt{2} 

 \sqrt{18}/ \sqrt{2} = 9 18/2= 9\\d) [tex] \sqrt{20} / \sqrt{10} = 2
20/10=2


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