Question:
If $ f(x) = 2x^2 - 3x + 5 $, find $ f(3) $.
If $ f(x) = 2x^2 - 3x + 5 $, find $ f(3) $.
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Remember: To evaluate a function at a specific point, substitute the value of \( x \) and simplify.
Updated On: Jul 9, 2025
- \( 16 \)
- \( 18 \)
- \( 20 \)
- \( 19 \)
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The Correct Option is B
Solution and Explanation
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).
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