Advanced Math practice question

Answer: 2

x² − 2x = x(x − 2) = 0 gives x = 0 or x = 2; the sum is 2.

Common wrong answers

If you answered 0

0 is only one of the solutions.

If you answered 1

1 halves the sum.

If you answered 4

4 counts x = 2 twice.

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