Advanced Math practice question

Answer: 1

x − 1 = 0 gives x = 1; x + 4 = 0 gives x = −4.

Common wrong answers

If you answered 4

4 has the wrong sign; x + 4 = 0 gives −4.

If you answered -4

−4 is the negative solution.

If you answered -1

−1 has the wrong sign; x − 1 = 0 gives 1.

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