Question

Sendo a seguinte função f(x): x²+x-30, determine Os zeros da função

Answer 1

$a=1\\\\ b=1\\\\c=-30\\\\\\\\x=\frac{-b+-\sqrt{b^2-4ac}}{2a}=\frac{-1+-\sqrt{1-4.1.(-30)}}{2.1}=\frac{-1+-\sqrt{121}}{2}=\frac{-1+-11}{2} \\\\ \\\\ x' = \frac{-1+11}{2}=5 \\\\ x'' = \frac{-1-11}{2}=-6$