Advanced Math practice question

Answer: 144

4x² + 12xy + 9y² = (2x + 3y)² = 12² = 144.

Common wrong answers

If you answered 12

12 is 2x + 3y itself.

If you answered 24

24 is 2 × 12, not the square.

If you answered 48

48 is 4 × 12, multiplying by the leading coefficient instead of squaring.

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