3 years ago

F (x) = x^2 + 4x; Find f (−7)

Mathematics

1 answer:

elena-14-01-66 [18.8K]3 years ago

4 0

Answer:

f(-7) = 21

General Formulas and Concepts:

Pre-Alg

Order of Operations: BPEMDAS

Step-by-step explanation:

Step 1: Define

f(x) = x² + 4x

f(-7) is x = -7

Step 2: Solve

Substitute: f(-7) = (-7)² + 4(-7)
Evaluate: f(-7) = 49 + 4(-7)
Multiply: f(-7) = 49 - 28
Subtract: f(-7) = 21

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