Select the approximate values of x that are solutions to f(x) = 0, where f(x) = -6x^2 + 8x + 5.

Question

A{1.80, –0.46}

B{-6, 8}

C{–1.33, –0.83}

D{–1.20, 1.60}

Answer 1

Using the quadratic formula

X=[-8+- sqrt(64-4(-6)(5))]/(2•-6)

X=[-8+-13.56]/(-12)

X=-.46, 1.80