Question

If f(x) = 2x - 3, find f(-2).

Answer 1

Given :

• f(x) = 2x - 3

To Find :

• f(-2) = ?

Solution :

As, f(x) = 2x - 3

Therefore, f(-2) = 2(-2) - 3

$\sf : \implies f(-2) = 2(-2) - 3$

$\sf : \implies f(-2) = - 4 - 3$

$\sf : \implies f(-2) = - 7$

Hence, value of f(-2) is - 7.

Answer 2

Substitute-2 for x in the equation and get 2•-2=-4 then subtract 3 from -4, -4-3=-7 so the answer is -7