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   Decide how many real solutions each equation below has. Explain how you know. You may not need to solve the equation. Homework Help ✎

  1. Can you easily solve for and find an answer?

    How many values are possible?

    One solution. What is your explanation?

  2. Try solving for by square-rooting each side.
    What do you notice?

  3. See hints from part (a).

  4. What type of number does an absolute value sign make? Positive or negative?

    No solution; Absolute value must be positive or zero.