Answered

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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......

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Sagot :

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
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