Advanced Math practice question

Answer: 5

Area = x(x + 1)/2 = 15 → x² + x − 30 = 0 → (x + 6)(x − 5) = 0 → x = 5.

Common wrong answers

If you answered 6

6 is x + 1, the longer leg.

If you answered 30

30 is x(x + 1), the doubled area.

If you answered -6

−6 is the rejected negative root.

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