[obm-l] Ajuda

To: obm-l@xxxxxxxxxxxxxx
Subject: [obm-l] Ajuda
From: "Marcelo Costa" <mat.moura@xxxxxxxxx>
Date: Sat, 21 Jul 2007 23:07:18 -0300
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Alguém poderia me ajudar??

Sabendo-se que x^4 = (x - 1)^2, então o valor de (2x + 1)^2 vale:
a) 3
b) 4
c) 5
d) 6
e) 7

Valeu!!!