16Hit1600
Advanced MathMediumPositive root of a quadratic in words

Advanced Math practice question

The square of a positive number, added to five times the number, equals 24. What is the number?

Answer: 3

n² + 5n − 24 = (n + 8)(n − 3) = 0, so n = 3.

Common wrong answers

If you answered 4
4 gives 16 + 20 = 36.
If you answered 24
24 copies the constant.
If you answered -8
−8 is the negative root.

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