f(x)=-x²-6x+5

\(f(x) = -x^2-6x+5\)

\(f(x) = {-(-6) \pm \sqrt{(-6)^2-4(-1))5)} \over 2(-1)}\)

\(f(x)=-3 \pm \sqrt{14}\)

\(\bf f(x) \approx -6.742, .742\)

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