Advanced Math practice question

Answer: -3

x² − 9 = (x − 3)(x + 3), so the solutions are 3 and −3. The one not shared is −3.

Common wrong answers

If you answered 0

0 is not a solution: 0 − 9 is not 0.

If you answered 3

3 is the shared solution.

If you answered 9

9 is the constant.

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