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[obm-l] Equa��o 2 grau
- To: obm-l@xxxxxxxxxxxxxx
- Subject: [obm-l] Equa��o 2 grau
- From: "Bruna Carvalho" <bruna.carvalho.pink@xxxxxxxxx>
- Date: Tue, 17 Oct 2006 23:32:48 -0200
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Demostrar que dada uma equa��o do segundo grau ax^2+bx=c=0, a,b, c
reais e a diferente de zero, se a e c tem sinais contraios, isto �, a � positivo e
c negativo ou vice versa, ent�o a equa��o admite duas ra�zes reais, distintas, sendo um positiva e outra negativa.