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Determine o conjunto solução da solução:
-9x²-27x=0
-9x²-27x=0(-1)
9x²+27x=0
D(Delta)= 27²-4.9.1
D = 729-36
D = 693
X = -27 +/-Raiz de 693
2.9
Tenho dúvidas quando chega na hora de resolver o x como esstá retratado em cima, a raiz do delta não é exata.
Como no meu deu raiz de 693 eu sei que o começo é fatorando, mas o resto eu fico em dúvida.
A professora da minha escola mandou um trabalho para fazermos, e então tive essa dúvida.
![](http://www.professoronline.net/wp-content/uploads/2012/02/professores_online.jpg)
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Ainda nao ha resposta para essa pergunta, enquanto isso pode-se tornar um usuario premium para atendimento especializado. Saiba mais em escritorios de advocacia online.Answer this Question
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