$2 x^{2} - 3 x + 4$ , when $x = - 2$ .

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Solution

Given $2 x^{2} - 3 x + 4$
Put $x = 2$ , we get
$2 (- 2)^{2} - 3 (- 2) + 4 = (2 \times 4) + 6 + 4 = 18$

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