Advanced Math practice question

Answer: 4

Squaring: x = x²/4, so x² − 4x = 0 and x(x − 4) = 0; the positive solution is 4.

Common wrong answers

If you answered 0

0 satisfies the equation but is not positive.

If you answered 2

2 gives √2 ≈ 1.41 and 2/2 = 1.

If you answered 16

16 gives 4 and 8.

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