Question

determine se existirem as raízes da função quadratica f(x)=x*2+3x

Answer 1

$f(x)= x^{2} +3x \\ \\ Delta= b^{2} -4ac \\ \\ Delta = 3^{2} -4.1.0 x^{2} x^{2} \\ \\ Delta=9 \\ \\ x'= \frac{-3+ \sqrt{9} }{2} \\ \\ x'= \frac{-3+3}{2} =0 \\ \\ x"= \frac{-3-3}{2} =-3 \\ \\ \\ S={-3 e 0}$