If $P (x) = 7 - 3 x + 2 x^{2}$ then value of $P (- 2)$ is :

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Solution

The correct option is C 21
$p (x) = 7 - 3 x + 2 x^{2}$
Putting $x = - 2$ ,
$p (- 2) = 7 - 3 (- 2) + 2 (- 2)^{2}$
$= 7 + 6 + 8$
$= 21$

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