Advanced Math practice question

Answer: 4

Square both sides: x² + 9 = 25, so x² = 16 and the positive solution is x = 4.

Common wrong answers

If you answered 2

Subtract 9 from 25 before rooting: x² = 16, so x = 4.

If you answered 16

16 is x²; take its square root.

If you answered 5.83

Do not subtract 9 from 5; square first: x² + 9 = 25.

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