Question

If f(x) = 2x2 - x, find f(-3).

Answer 1

The answer is 15 just plug in the -3 where the x is

Answer 2

The value of f(-3) is 21

Explanation:

`f(x)= 2x^2-x`

we need to find out f(-3) using the given f(x)

f(-3) means x is -3, plug in -3 for x

`f(x)= 2x^2-x`

`f(-3)= 2(-3)^2-(-3)`

`f(-3)= 2(9)-(-3)`

`f(-3)= 18+3= 21`

The value of f(-3) is 21