SOLUTION: In solving the equation (x + 3)(x � 3) = -8, Eric stated that the solution would be x + 3 = -8 => x = -11 or (x � 3) = -8 => x = -5 However, at least one of these solutions fa

Question 369288: In solving the equation (x + 3)(x � 3) = -8, Eric stated that the solution would be
x + 3 = -8 => x = -11
or
(x � 3) = -8 => x = -5
However, at least one of these solutions fails to work when substituted back into the original equation. Why is that? Please help Eric to understand better; solve the problem yourself, and explain your reasoning.
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
Because the product of and must equal
If and at the same time, then it would work.
If , then ,
If , then ,
Neither product is .
.
.

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