Question

Find (3) if
f(x)=x2 + 2x2-x-1

Answer 1

The correct answer is:

`f(3)=23`

Explanation:

By evaluating first, and then the mathematical calculation, we have:

`f(3)= 3^(2) + 2 ×3^(2) - 3 -1`

`= 9 +18 -3-1`

`= 23`