Question

If f(x)=2x^2-3x, what is the value of f(5)?

Answer 1

In this example, all you have to do is plug in 5 wherever you see x

For example: f(5) = 2(5)^2 - 3(5)

Work out the equation and you get f(5) = 2(25) - 15, keep going and you are left with f(5) = 50 - 15

Answer f(5) = 35