Respuesta :

Space

Answer:

k(3n) = 9n² + 9n

General Formulas and Concepts:

Order of Operations: BPEMDAS

  • Substitution and evaluation

Step-by-step explanation:

Step 1: Define

k(n) = n² + 3n

k(3n) is n = 3n

Step 2: Solve

  1. Substitute:                        k(3n) = (3n)² + 3(3n)
  2. Exponents:                       k(3n) = 9n² + 3(3n)
  3. Multiply:                            k(3n) = 9n² + 9n