Advanced Math practice question

Answer: 3

x + 4 = ±7, so x = 3 or x = −11. The positive value is 3.

Common wrong answers

If you answered 7

7 is x + 4, not x.

If you answered 45

45 comes from x + 4 = 49 (forgetting the square root).

If you answered -11

−11 is the other solution, not positive.

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