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Popular >

circumference x^2+y^2+4x-2y=-1

Solution

circumference

x^{2} + y^{2} + 4 x - 2 y = - 1

Solution

C = 4 π

Solution steps

C = 2 π r

Find the radius

Radius given

x^{2} + y^{2} + 4 x - 2 y = - 1 : r = 2

C = 2 π 2

Refine

C = 4 π

Popular Examples

circumference 4x^2+4y^2-4x+2y-1=0 circumference

4 x^{2} + 4 y^{2} - 4 x + 2 y - 1 = 0

circumference (x-1)^2+(y-2)^2=4 circumference

(x - 1)^{2} + (y - 2)^{2} = 4

circumference (x+2)^2+(y-3)^2=16 circumference

(x + 2)^{2} + (y - 3)^{2} = 16

circumference x^2+y^2<=+16 circumference

x^{2} + y^{2} \leq + 16

circumference (x+6)^2+(y+5)^2=8 circumference

(x + 6)^{2} + (y + 5)^{2} = 8

Frequently Asked Questions (FAQ)

What is the circumference x^2+y^2+4x-2y=-1 ?
The circumference x^2+y^2+4x-2y=-1 is C=4pi