Question

F(x) = 4x^2+ 7x – 18
f(-9)

Answer 1

f(-9) = 243

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

• Function Notation

Explanation:

Step 1: Define

f(x) = 4x² + 7x - 18

f(-9) is x = -9

Step 2: Evaluate

1. Substitute in x: f(-9) = 4(-9)² + 7(-9) - 18
2. Evaluate Exponents: f(-9) = 4(81) + 7(-9) - 18
3. Multiply: f(-9) = 324 - 63 - 18
4. Subtract: f(-9) = 261 - 18
5. Subtract: f(-9) = 243