Respuesta :

Space

Answer:

-3x⁴ + 8x³ - 9x² - 7x - 9

General Formulas and Concepts:

  • Combining like terms

Step-by-step explanation:

Step 1: Define expression

(5x³ - 3x⁴ - 2x - 9x² - 2) + (3x³ + 2x² - 5x - 7)

Step 2: Simplify

  1. Combine like terms (x³):                    -3x⁴ + 8x³ - 9x² - 2x - 5x - 2 - 7
  2. Combine like terms (x):                     -3x⁴ + 8x³ - 9x² - 7x - 2 - 7
  3. Combine like terms (constants):       -3x⁴ + 8x³ - 9x² - 7x - 9