Question

Select the approximate values of x that are solutions to f(x) = 0, where f(x) = -2x^2 + 2x + 8.

Answer 1

to find roots of quadratic equation
\[ax ^{2}+bx+c=0\]
use this formula
\[x=\frac{ -b \pm \sqrt{b ^{2}-4ac} }{ 2a }\]