Math Is Fun Forum

Lily

Guest

help in converting a circle to a standard form

x^2+y^2+9x-8y=0

__________________
x^2+9x+(81/160)+y^2-8y+16=0
(x+9/4)^2+9y-40^2=(81/16)(16)
                             = (337/16)....
then i didn't know how to solve the rest of it..
plz help me ... thanx

Lily

Guest

Re: help in converting a circle to a standard form

the equation i just wrote is general forum (AX^2+Cy^2+Dx+Ey+F=0
i need convert standard form, the standard form for circle is
(x-h)^2+(y-k)^2=1
___        ___
  a^2       b^2

Lily

Guest

Re: help in converting a circle to a standard form

Thank you !