Advanced Math practice question

Answer: 3

Since x + 1 ≠ 0, divide both sides by (x + 1): x + 1 = 4, so x = 3.

Common wrong answers

If you answered 1

1 comes from (x + 1) = 2, taking a square root of 4 wrongly.

If you answered 4

4 is x + 1, not x.

If you answered -1

−1 is excluded by the condition x ≠ −1.

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