Question

If $ f(x) = 2x^2 - 3x + 5 $, find $ f(3) $.

• A. \( 16 \)
• B. \( 18 \)
• C. \( 20 \)
• D. \( 19 \)

Hint:

Remember: To evaluate a function at a specific point, substitute the value of \( x \) and simplify.

Answer 1

The Correct Option is B

Step 1: Substitute \( x = 3 \) into the function
We are given the function \( f(x) = 2x^2 - 3x + 5 \), and we need to evaluate \( f(3) \). 
Substitute \( x = 3 \) into the function: \[ f(3) = 2(3)^2 - 3(3) + 5 \] 
Step 2: Simplify the expression
\[ f(3) = 2(9) - 9 + 5 = 18 - 9 + 5 = 18 \] 
Answer:
Therefore, \( f(3) = 18 \). So, the correct answer is option (2).