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ACT Math · Question of the Day

ACT Math Question of the Day

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Friday, September 18, 2026

Which polynomial is equivalent to (x+1)2(x + 1)^2?

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Question of the Day

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Which polynomial is equivalent to (x+1)2(x + 1)^2?

  1. x2+2xx^2 + 2x
  2. x2−2x+1x^2 - 2x + 1
  3. x2+1x^2 + 1
  4. x2+2x+1x^2 + 2x + 1 (correct answer)

Explanation: We need to expand (x + 1)² using the perfect square formula. Using (a + b)² = a² + 2ab + b², where a = x and b = 1: (x + 1)² = x² + 2(x)(1) + 1² = x² + 2x + 1.