If $f (x) = 3 - 2 x$ , find $f (- 4)$ and $f (11)$ .

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Solution

Given, $f (x) = 3 - 2 x$
$\Rightarrow f (- 4) = 3 - 2 (- 4)$
$= 3 + 8$
$= 11$
$\Rightarrow f (11) = 3 - 2 (11)$
$= 3 - 22$
$= - 19$

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