Answer and explanation

Correct answer: D.

**Answer: . Why not the others:** is extraneous because ; ' and ' fails to discard the extraneous root; 'No real solution' overlooks .
  1. Step 1: The right side must satisfy , which requires .
  2. Step 2: Case 1: . But , so is extraneous. Case 2: . Since , it is the only valid solution.

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