Advanced Math practice question

Answer: 3

Factor: (2x + 9)(x − 3) = 0, so x = 3 or x = −9/2. The positive solution is 3.

Common wrong answers

If you answered 9

9 comes from misreading the factor (2x + 9) as giving x = 9.

If you answered 27

27 is the constant term, not a root.

If you answered -4.5

−4.5 is the negative solution.

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