Advanced Math practice question

Answer: 2

Set equal: x² + 1 = 2x + 1, so x² − 2x = 0 and x(x − 2) = 0. Besides x = 0 (the given point), the graphs meet at x = 2.

Common wrong answers

If you answered 1

1 is the shared y-intercept, not the x-coordinate of the other intersection.

If you answered 5

5 is the y-coordinate of the other intersection (2² + 1 = 5), not its x-coordinate.

If you answered -2

−2 has the wrong sign: x(x − 2) = 0 gives x = 2.

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