Question

Fx) = -3x² + 2x - 7, then f(-1) =​

Answer 1

Given:

The function is

$f(x)=-3x^2+2x-7$

To find:

The value of f(-1).

Solution:

We have,

$f(x)=-3x^2+2x-7$

Putting x=-1, we get

$f(-1)=-3(-1)^2+2(-1)-7$

$f(-1)=-3(1)-2-7$

$f(-1)=-3-9$

$f(-1)=-12$

Therefore, the value of f(-1) is -12.