Advanced Math practice question

Answer: 4

3x² − 5x − 28 = (3x + 7)(x − 4) = 0, so x = 4.

Common wrong answers

If you answered 7

7 gives 147 − 35 = 112.

If you answered -7/3

−7/3 is the negative solution.

If you answered 28/3

28/3 solves 3x = 28.

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