Advanced Math practice question

Answer: 2

x − 1 = ±2 gives x = 3 or x = −1. The sum is 2.

Common wrong answers

If you answered 0

0 forgets the shift of 1 in each solution.

If you answered 3

3 is only the larger solution.

If you answered 4

4 counts only the solution x = 3 and adds 1.

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