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Beliebt Geometry >

radius x^2-4x+y^2+8y=-4

Lösung

radius

x^{2} - 4 x + y^{2} + 8 y = - 4

Lösung

r = 4

Schritte zur Lösung

x^{2} - 4 x + y^{2} + 8 y = - 4

Rewrite

x^{2} - 4 x + y^{2} + 8 y = - 4

in the form of the standard circle equation

(x - 2)^{2} + (y - (- 4))^{2} = 4^{2}

Therefore the circle properties are:

(a, b) = (2, - 4), r = 4

And the radius is:

r = 4

Graph

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