Advanced Math practice question

Answer: 24

(x² + 12x + 36) − (x² − 12x + 36) = 24x: a line through the origin with slope 24.

Common wrong answers

If you answered 0

0 would mean the squares were equal, which is false unless x = 0.

If you answered 12

12 halves the answer; the middle terms are +12x and −12x, which combine to 24x.

If you answered 72

72 is the sum of the constants 36 + 36, but they cancel.

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