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Q. 3. Find the value of the following expressions, when $x=-1$ :

(iv) $2x^{2}-x-2$

Answers (1)

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$\\2x^2 - x - 2 \\= 2\times ( -1 )^2 - ( -1 ) - 2 \\ = 2 + 1 - 2 \\= 1$

So the value at x=-1 is 1

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