Given the function below:
[tex] \large{f(x) = - 3 {x}^{2} + 4x - 1}[/tex]
To find f(-2), we substitute x = -2 in the equation. Since f(-2) means the value of f(x) at x = -2.
[tex] \large{f( - 2) = - 3 {( - 2)}^{2} + 4( - 2) - 1}[/tex]
Replace x-term to -2 and evaluate.
[tex] \large{f( - 2) = - 3(4) - 8 - 1} \\ \large{f( - 2) = - 12 - 8 - 1 \longrightarrow f( - 2) = - 21}[/tex]
Answer
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