Respuesta :

Answer:

D

Step-by-step explanation:

Distribute the parenthesis and collect like terms.

Note the second parenthesis is distributed by - 1

5x³ + 4x² - 6x² + 2x + 9 ← collect like terms

= 5x³ - 2x² + 2x + 9


ec322

Answer:

1.3^3-0.2t^2-6t-8

Step-by-step explanation: