Advanced Math practice question

Answer: 2

The left side is (x + 3)², so x + 3 = 5 or x + 3 = −5, giving x = 2 or x = −8. The positive solution is 2.

Common wrong answers

If you answered 4

4 uses x + 3 = 7, a slip.

If you answered 16

16 subtracts 9 from 25.

If you answered -8

−8 is the negative solution.

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