Question

Given the relation y = –4x2 – 8, if the input is 2, what is the output?

Answer 1

Given, input (x) is 2,

`y = -4x^2 - 8\\y = -4(2)^2 - 8\\y = -4(4) - 8\\y = -16 - 8\\y = -24`

Output (y) is 24

Answer 2

y = -24

General Formulas and Concepts:

Pre-Alg

• Order of Operations: BPEMDAS

Explanation:

Step 1: Define

y = -4x² - 8

x = 2

Step 2: Solve

1. Substitute: y = -4(2)² - 8
2. Evaluate: y = -4(4) - 8
3. Multiply: y = -16 - 8
4. Subtract: y = -24