Respuesta :

Space

Answer:

2x³ + 8x

General Formulas and Concepts:

Pre-Alg

  • Distributive Property

Alg I

  • Combining like terms

Step-by-step explanation:

Step 1: Define

(9x³ + 5x) - (7x³ - 3x)

Step 2: Solve

  1. Distribute negative:               9x³ + 5x - 7x³ + 3x
  2. Combine like terms:               2x³ + 8x