Respuesta :

Answer:

2a² - 2b - 1

Step-by-step explanation:

Given

- 5 + b + 2a² - 3b + 4 ← collect like terms

= 2a² + (b - 3b) + (- 5 + 4)

= 2a² + (- 2b) + (- 1)

= 2a² - 2b - 1