Advanced Math practice question

Answer: 7

(x − 3)² = 16, so x − 3 = ±4 and x = 7 or −1. The positive value is 7.

Common wrong answers

If you answered 4

4 is x − 3, not x.

If you answered 19

19 comes from (x − 3)² = 16 solved as x = 16 + 3.

If you answered -1

−1 is the other solution, but the question asks for the positive one.

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