Making x the subject

• jlzk

  20 Sep 07, 21:19

  y=sq root (x-2)/(2x+1)
  
  How to make X the subject i only know the first method with is squaring 2 sides so become
  
  y^2=(x-2)/(2x+1)
  
  Kindly guide and help me along please thanks
• eagle

  20 Sep 07, 21:21

  Originally posted by jlzk:

  y=sq root (x-2)/(2x+1)
  
  How to make X the subject i only know the first method with is squaring 2 sides so become
  
  y^2=(x-2)/(2x+1)
  
  Kindly guide and help me along please thanks

  (2x+1) y^2 = x-2
  
  2x y^2 - x = -2 -y^2
  x(2y^2 -1) = -2 - y^2
  
  x = (2 + y^2) / (1 - 2y^2)
• jlzk

  20 Sep 07, 21:41

  Originally posted by eagle:

  (2x+1) y^2 = x-2
  
  2x y^2 - x = -2 -y^2
  x(2y^2 -1) = -2 - y^2
  
  x = (2 + y^2) / (1 - 2y^2)

  Thank you! =)
• popikachu

  20 Sep 07, 23:31

  sec 2 or sec 3 maths?
• dbowie

  20 Sep 07, 23:35

  O'level maths ..
• Youngplainjuan

  21 Sep 07, 20:33

  LOl. one look and i immediately figured it out. Get to poly or JC quick and these questions might seem like a breeze!
• eagle

  21 Sep 07, 20:56

  Originally posted by Youngplainjuan:

  LOl. one look and i immediately figured it out. Get to poly or JC quick and these questions might seem like a breeze!

  which is why although I was damn busy ytd, I still took that 1 min to answer mentally and type it out