Resposta:
[tex]delta= b^{2} - 4.a.c\\delta= 6^{2} - 4.5.3\\delta= 36-60\\delta= 24\\\\[/tex]
[tex]x=\frac{-b +/- \sqrt{delta} }{2.a} \\\\x=\frac{-6+/-\sqrt{24} }{2.5} \\\\x=\frac{-6+/-24}{10}\\\\x =\frac{-6+24}{10} =\frac{-30}{10}= -15\\\\x=\frac{-6-24}{10} = \frac{18}{10}= 1,8 \\\\[/tex]
As raizes dessa equacao sao -15 e 1,8
Espero ter ajudado :)
