Respostas

2013-08-29T13:11:13-03:00
A) √x+1 =4 ->  \sqrt{x} =4-1 ->  \sqrt{x} =3 -> x =  3^{2} -> x = 9

b) 2 (5+ \sqrt{x} )=14 -> 5+ \sqrt{x} = \frac{14}{2} ->  \sqrt{x} = 7-5 ->  \sqrt{x} =2 -> x =  2^{2} -> x = 4
1 5 1