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28 votes
28 votes
Evaluate the function. f(x)=−x^2 −6x+12 Find f(4)

User Rishi Tiwari
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1 Answer

15 votes
15 votes

1. How to find f(4)?

  • I explained how to find f(5) in your previous question. It is exactly the same. We substitute x = 4 in the equation.

2. Substitution and Evaluate


\large{f(4) = - {(4)}^(2) - 6(4) + 12}

Follow BODMAS/PEMDAS rules as well! Exponent first.


\large{ f(4) = - 16 - 24 + 12} \\ \large{f(4) = - 40 + 12} \\ \large{f(4) = -2 8}

3. Final Answer

  • f(4) = -28.
User Sugendran
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