Advanced Math practice question

Answer: 4

n² − n = 12, so n² − n − 12 = (n − 4)(n + 3) = 0. The positive solution is 4.

Common wrong answers

If you answered 3

3 gives 9 − 3 = 6, not 12.

If you answered 12

12 gives 144 − 12 = 132.

If you answered -3

−3 is the other root, but the number is positive.

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