Q

# 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) $2x^{2}-x-2$

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