Respuesta :

Answer: -s² - 3s + 6

Step-by-step explanation:

b = 1 - 2s² - s

c = 3 + 5s²

Substitute

3b + c

3 (1 - 2s² - s) + 3 + 5s²

3 - 6s² - 3s + 3 + 5s²

Put like terms together

-6s² + 5s² - 3s + 3 + 3

-s² - 3s + 6

Hope I helped!