the sum of the squares of two no is 12 and their sum is 15.find the product ofthe two no?

• x+y=15
  x^2+y^2=12
  2xy=(x+y)^2-(x^2+y^2);
  hence ans=213/2
  =106.5
• 13 years agoHelpfull: Yes(18) No(1)
• let 2 nos. be x n y,
  given,
  x2+y2=12;
  x+y=15;
  xy=((x+y)2-(x2+y2))/2,
  =(225-12)/2
  so, xy=106.5
• 13 years agoHelpfull: Yes(7) No(3)
• a+b=15
  a^2+b^2=12
  2ab= (a+b)^2-(a^2+B^2)
  2ab= 15^2-12
  2ab= 113
  ab=56.5
• 13 years agoHelpfull: Yes(1) No(18)