Respuesta :

Answer:

answer is down below

Step-by-step explanation:

u have ur two brackets.

(9b+3)(b-7)=0

take 1 bracket at a time

9b+3=0

solve it so:

9b+3=0

9b=-3

b= -3 / 9

Ans: b=-1/3

take the other bracket

b-7=0

solve it:

Ans: b=+7