Respuesta :

Space

Answer:

7x² + 2x - 4

General Formulas and Concepts:

Algebra I

  • Combining Like Terms

Step-by-step explanation:

Step 1: Define

(5x² + 2x - 10) + (2x² + 6)

Step 2: Simplify

  1. Combine like terms (x²):                    7x² + 2x - 10 + 6
  2. Combine like terms (Z):                     7x² + 2x - 4