Find the value of the following expression, when $x = - 1$ .
$2 x - 7$ .

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Solution

Equation $\to 2 x - 7$
$x = - 1$
$= 2 (- 1) - 7$
$= - 2 - 7$
$= - 9$ .

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x = - 1

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Question 3 (i)

Find the value of the following expression, when x = -1:
2x - 7

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

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