Solve the equation. √1 - 2b = 1 + b
1. 0 and 4
2. -2 only
3. 0 only
4. 0 and -2

The final result is, C) 0 only.

We gathered the solutions of b = 0, -4.
b = -4 was not true so we had to remove it from the solution set, and we are left with b = 0 now. You can check this answer by substituting 0 in for b in the original equation. You should get 1 = 1, which is the correct answer.