Question

If $ f(x) = 3x^2 + 5x - 7 $, find $ f(2) $.

• A. \( 9 \)
• B. \( 15 \)
• C. \( 7 \)
• D. \( 5 \)

Hint:

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

Answer 1

The Correct Option is A

Step 1: Substitute \( x = 2 \) into the function
Given the function \( f(x) = 3x^2 + 5x - 7 \), calculate \( f(2) \).Substitute \( x = 2 \):\[f(2) = 3(2)^2 + 5(2) - 7\]
Step 2: Simplify the expression
\[f(2) = 3(4) + 5(2) - 7\]\[f(2) = 12 + 10 - 7\]\[f(2) = 15\]
Answer:
Thus, \( f(2) = 15 \). The correct option is (2).