Question

2025 semester 1 exam review part 1
determine the value of f(-6) in the function f(x) = 2x² + 3x - 1
-5/3
-91
53
9

Explanation:

Step1: Substitute \( x = -6 \) into the function

We have the function \( f(x) = 2x^2 + 3x - 1 \). Substitute \( x = -6 \) into it: \( f(-6)=2(-6)^2 + 3(-6)-1 \).

Step2: Calculate each term

First, calculate \( (-6)^2 = 36 \), so \( 2(-6)^2 = 2\times36 = 72 \). Then, \( 3(-6)= -18 \). Now the expression becomes \( 72 - 18 - 1 \).

Step3: Simplify the expression

Calculate \( 72 - 18 = 54 \), then \( 54 - 1 = 53 \).

Answer:

53