Respostas

2014-05-19T19:42:33-03:00
A) a² +6a +9= ( a + 3 )²
a² +2.a.3 + 3²= a² +6a +9(prova real)

b) 4x² +4x +1 = ( 2x + 1 )²
(2x)² +2.2x.1 + 1²= 4x² +4x +1(prova real)
2 3 2