What are the solutions to the absolute value equation |2x + 1| = 9?
✓ Correct Answer: Option C
Set 2x + 1 = 9 or 2x + 1 = -9. From the first, 2x = 8, so x = 4. From the second, 2x = -10, so x = -5. Both are valid solutions.
Set 2x + 1 = 9 or 2x + 1 = -9. From the first, 2x = 8, so x = 4. From the second, 2x = -10, so x = -5. Both are valid solutions.