Respuesta :

Jerc

Answer:

b = -5/2

Step-by-step explanation:

- 6 (b + 3)= - 8 + 5

- 6b - 18= - 3

- 6b= - 3 + 18

- 6b= 15

b= - 15/6

b= - 5/2

Answer:

x(x+4) = 21, or x²+4x-21 = 0

Step-by-step explanation: