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Find the value of the following expressions, when x = - 1: (iv) 2x^ 2 - x - 2

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

            (iv) 2x^{2}-x-2

Answers (1)
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S Sayak

\\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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