Question

F(x)=3x(x^2+4x-5) evaluate f(-2)​

Answer 1

f(-2) = 54

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

• Terms/Coefficients

Explanation:

Step 1: Define

f(x) = 3x(x² + 4x - 5)

f(-2) is x = -2

Step 2: Evaluate

1. Substitute in x [Function]: f(-2) = 3(-2)[(-2)² + 4(-2) - 5]
2. [Brackets] Evaluate exponents: f(-2) = 3(-2)[4 + 4(-2) - 5]
3. [Brackets] Multiply: f(-2) = 3(-2)[4 - 8 - 5]
4. [Brackets] Subtract: f(-2) = 3(-2)[-4 - 5]
5. [Brackets] Subtract: f(-2) = 3(-2)(-9)
6. Multiply: f(-2) = -6(-9)
7. Multiply: f(-2) = 54