Question

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

Answer 1

Answer:

The correct answer is:

$f(3)=23$

Step-by-step explanation:

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

$f(3)= 3^{2} + 2 ×3^{2} - 3 -1$ 

$= 9 +18 -3-1$  

$= 23$