Respostas

2014-08-07T19:18:56-03:00
1° identifique os coeficientes de a , b e c 

a~\to~ -\frac{1}{2} \\
\\b ~\to~1\\
\\c~\to~ \frac{3}{2}

Usando bhaskara

\Delta=b^2-4*a*c\\
\\\Delta=1^2-4*( -\frac{1}{2} )* \frac{3}{2} \\
\\\Delta=4

x= \frac{-b\pm \sqrt{\Delta} }{2a}

x= \frac{-1\pm \sqrt{4} }{2*(- \frac{1}{2} )} \\
\\x= \frac{-1\pm2}{-1}

x_1= \frac{-1+2}{-1} \\
\\\boxed{x_1=-1}

x_2= \frac{-1-2}{-1} \\
\\\boxed{x_2=3}
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