Advanced Math practice question

Answer: 0

x² = 0 has only x = 0; any positive k gives two solutions and any negative k gives none.

Common wrong answers

If you answered 1

x² = 1 has two solutions, 1 and −1.

If you answered 2

x² = 2 has two solutions.

If you answered -1

x² = −1 has no real solution.

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