Question

F(x) = 4x -1 find f(-2)
g(x) = 3x^2 - 2 find g(6)

Answer 1

f(-2) = -9

g(6) = 106

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

1. Brackets
2. Parenthesis
3. Exponents
4. Multiplication
5. Division
6. Addition
7. Subtraction

• Left to Right

Algebra I

• Functions
• Function Notation

Explanation:

Step 1: Define

Identify

f(x) = 4x - 1

f(-2) is x = -2 for function f(x)

g(x) = 3x² - 2

g(6) is x = 6 for function g(x)

Step 2: Evaluate

f(-2)

1. Substitute in x [Function f(x)]: f(-2) = 4(-2) - 1
2. Multiply: f(-2) = -8 - 1
3. Subtract: f(-2) = -9

g(6)

1. Substitute in x [Function g(x)]: g(6) = 3(6)² - 2
2. Exponents: g(6) = 3(36) - 2
3. Multiply: g(6) = 108 - 2
4. Subtract: g(6) = 106