If the sum of two numbers is 22 and the sum of their squares is 404, then the product of the numbers is
A. 40
B. 44
C. 80
D. 88

• For shortcut process as for time management we takes options ..
  1st we take option A)40
  let the multiplication of 2 number we get 20*2=40 and also 5*8=40 or 4*10=40..
  so therefore as for question we take 2number for their sum 20+2=22 ,as for question,then the square of 2 number is like that { (20)^2+(2)^2} =404.. so the question answer is matched..
  the ans is option A) 40 .. Thank You...
• 9 years agoHelpfull: Yes(6) No(5)
• x+y=22
  x^2+y^2 = 404
  now (x+y)^2 = x^2+y^2+2xy
  so 22^2 = 404 + 2xy
  so xy = 80/2 = 40
  
  
• 9 years agoHelpfull: Yes(0) No(0)