Question

Ax^2+Cy^2+F=0
A,C,F don't equal 0
A & C are of the same sign and F is of the opposite sigh
what is the equation of the circle when the center (0,0) if A equals C

Answer 1

if \(A=C\) then it is
\[Ax^2+Ax=-F\]

Answer 2

oops i meant
\[Ax^2+Ay^2=-F\]

Answer 3

or if you prefer
\[x^2+y^2=-\frac{F}{A}\]