Find the value of the following expressions, when $x = - 1$
$2 x^{2} - x - 2$

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Solution

Given equation is $2 x^{2} - x - 2$

Put $x = - 1$

$\Rightarrow$ $[2 (- 1) (- 1)] - (- 1) - 2$

$\Rightarrow$ $2 + 1 - 2$

$\Rightarrow$ $1$

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Similar questions

x = - 1

2 x^{2} - x - 2

Find the value of the following expressions, when x = − 1:

(i) 2x − 7 (ii) − x + 2 (iii) x² + 2x + 1

(iv) 2x² − x − 2

x = - 1

x^{2} + 2 x + 1

x = - 1

2 x^{2} - x - 2

Question 3 (iv)

Find the value of the following expressions, when x = -1:
$2 x^{2} - x - 2$

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