Question

If f(x) = - 2x2 + 2x - 3, what is f(5)?

Answer 1

`f(5)= - 43`

Explanation:

Numerical Value of Functions

A function can be seen as an equation that has only one value of y for every x inputted. It assigns exactly one output to every input value. Our function is defined by

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

To find f(5) we only need to replace the value of x into the given expression.

`f(5)=- 2(5)^2 + 2(5) - 3`

`f(5)=- 2(25) + 10 - 3`

`f(5)=- 50 + 10 - 3`

`\boxed{f(5)=- 43}`