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#31997 Bangla Language & Literature Equation and Inequality Level 0

If x + y = a and x - y = b, then 2xy =

  1. A (a - b)/2
  2. B (a2 - b2)/2
  3. C (b2 - a2)/2
  4. D ab/2
Answer: B - (a2 - b2)/2

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