Advanced Math practice question

Answer: 3

x² = 2x + 3 gives x² − 2x − 3 = (x − 3)(x + 1) = 0, so x = 3 or x = −1.

Common wrong answers

If you answered 1

1 comes from a factoring slip, (x − 1)(x − 3).

If you answered 9

9 is the y-coordinate at x = 3.

If you answered -1

−1 is the smaller x-coordinate.

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