. If x and y are both positive integers, how much greater is x than y?
1. x + y = 20
2. x = y²

• Is x=16, y=4??
• 12 years agoHelpfull: Yes(12) No(2)
• if x=yA^2 means x=y^2 then x=16, y=4
• 11 years agoHelpfull: Yes(1) No(0)
• 16+4=20
  16=4^2
  so, x is greater than y by 16-4 =12
• 9 years agoHelpfull: Yes(0) No(0)
• substitute the value of x from eqn 2.
  
  then y^2 + y - 20 = 0
  
  y= -5 or 4
  
  but y = 4(according to question)
  
  from eqn 2.
  
  x=y^2
  =4^2
  =16
  
  therefore x is greater than y by 12.
• 4 years agoHelpfull: Yes(0) No(0)