To evaluate the function f(x) = 2x² + 3x + 5 for the input value of 3, you need to substitute 3 in place of x in the function.
Here are the steps to do so:
- Substitute 3 for x in the function:
- Now, calculate the value of (3)²:
- Next, plug this value back into the function:
- Calculate 2(9):
- Now calculate 3(3):
- Now, put everything together:
- Add these values:
f(3) = 2(3)² + 3(3) + 5
(3)² = 9
f(3) = 2(9) + 3(3) + 5
2(9) = 18
3(3) = 9
f(3) = 18 + 9 + 5
18 + 9 + 5 = 32
So, the value of the function f(x) at x = 3 is 32.