Advanced Math practice question

Answer: 4

x² − 2x = 3 gives (x − 3)(x + 1) = 0, so the points are (3, 3) and (−1, 3). They share a y-coordinate, so the distance is 3 − (−1) = 4.

Common wrong answers

If you answered 2

2 is the SUM of the x-coordinates, or half the distance.

If you answered 3

3 is one x-coordinate (and the y-value of the line).

If you answered -3

−3 is the PRODUCT of the x-coordinates; distance is positive.

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