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# Determine whether the equation represents a circle, a point, or have no graph a) 1 – x 2 – y 2 = 0

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Determine whether the equation represents a circle, a point, or have no
graph
a) 1 – x2 – y2 = 0

b) x2+ y2 + x –y = 0

Oct 29, 2021

### 1+0 Answers

#1
+12727
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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.

!

Oct 29, 2021