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

গণিত
Equation and Inequality

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

  • ক. (b2 - a2)/2
  • খ. (a2 - b2)/2
  • গ. (a - b)/2
  • ঘ. ab/2

সঠিক উত্তরঃ

(a2 - b2)/2
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Equation and Inequality