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Find f(8) iff(x) = x² + 2x - 1
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4 votes
Find f(8) iff(x) = x² + 2x - 1

User Jpkroehling
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1 Answer

5 votes

Substitute 8 for x in the equation to ontain the value of f(8).


\begin{gathered} f(8)=(8)^2+2\cdot8-1 \\ =64+16-1 \\ =79 \end{gathered}

So answer is f(8)=79.

User Jonspaceharper
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