pls need help. Find the illegal values of b in the fraction

Answer: b = -2 or b = 4
Step-by-step explanation:
The statute in question states it is a violation punishable by 3 years of remedial math to divide by zero. The law passed because if you are allowed to divide by zero, you can prove 2+2=5.
b^2 - 2b - 8 = 0
(b+2)(b-4) =0
b = -2 or b = 4
Using either of those values could land you in hot water.