To solve the absolute value equation , we need to consider two cases based on the sign of the expression inside the absolute value:
Case 1: When , i.e.,
In this case, the absolute value . So our equation becomes:
However, we assumed at the beginning of this case that . Since does not satisfy the condition , this solution is extraneous for this case and should be discarded.
Case 2: When , i.e.,
In this case, the absolute value
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