Advanced Math practice question

Answer: 8

Expand: 2x² − 4x + 10 = 2(x − 1)² + 8, which is least, 8, at x = 1. (Directly: f(1) = 4 + 4 = 8.)

Common wrong answers

If you answered 0

0 would need both squares to be 0 at once, which is impossible.

If you answered 1

1 is the x-coordinate of the minimum, not its value.

If you answered 10

10 is f(0), not the minimum.

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