Respostas

2013-09-09T11:52:25-03:00
X2/2=200
x2=200.2
x2=400
(tira a raiz quadrada)
x=20
2013-09-09T12:08:37-03:00
x2  =  200
 2
x2 = 200 
x = 200 x 2
x2 = 400
x = √400
x = 20