Question

Select the approximate values of x that are solutions to f(x) = 0, where

f(x) = -2x2 + 9x + 9.

{–0.22, 1.00}

{-2, 9}

{–4.50, –4.50}

{–0.84, 5.34}

please help me need to answer asap......

please please help meeeeeeeeeeeeeeeeeeeee

Answer 1

a=-2;b=9;c=9;
delta=b^2-4*a*c
root1=(-b+(delta^(0.5)))/(2*a)
root2=(-b-(delta^(0.5)))/(2*a)

delta =153
root1 = -0.8423
root2 = 5.3423

Correct Answer is D