MartinSouthey
New member
- Joined
- Aug 9, 2017
- Messages
- 5
Drawing a circle: y = x^2 + y^2 + 3x + 3y + 4
I have a question as part of my assignment, the question involves drawing a circle in graphing software and finding the intercepts against a parabola. Normally this is no issue, however I cant make sense of the equation of the circle. It is given as "Draw the circle y = x^2 +y^2 + 3x + 3y + 4"
rearranging this equation I come to x^2 + 3x + y^2 + 2y = 0. and completing the square gives (x+1.5)^2 + (y + 1)^2 = -0.75. -0.75 cannot be the square of a radius, and hence this equation cannot represent the equation of a circle. Have I done something obviously wrong?
I have a question as part of my assignment, the question involves drawing a circle in graphing software and finding the intercepts against a parabola. Normally this is no issue, however I cant make sense of the equation of the circle. It is given as "Draw the circle y = x^2 +y^2 + 3x + 3y + 4"
rearranging this equation I come to x^2 + 3x + y^2 + 2y = 0. and completing the square gives (x+1.5)^2 + (y + 1)^2 = -0.75. -0.75 cannot be the square of a radius, and hence this equation cannot represent the equation of a circle. Have I done something obviously wrong?
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