Determine whether the equation represents a circle, a point, or have no
graph
Hello Guest!
a)
1 – x^2 – y^2 = 0
\(y=\pm \sqrt{1-x^2}\)
is the equation of a circle.
b)
\(x^2+ y^2 + x –y = 0\)
\(y=\frac{1}{2}(1\pm \sqrt{-4x^2-4x+1})\ |\ wolfram\ alpha\)
is the equation of a circle.
!