Answer:
For your first answer it is because they are two different ways to solve the equation
Step-by-step explanation:
For Example!
(x-4)² – 28 = 8
The 8 is positive making it a different equation (this is like absolute value). (I am assuming you know the answer to the probelm)
(x-4)² – 28 = -8
The 8 could be negative meaning that when you add the 28 to the right side it is -8+28 which will be a negative!