Question

How do i change this equation
x^2 + y^2 - 8y=20
Into this form
(x-h)^2 + (y-k)^2= r^2
I am graphing a circle
Please help!!!!

Answer 1

complete square for the y variable

Answer 2

x^2+y^2-8y+16=20+16
x^2+(y-4)^2=36

Answer 3

x^2+(y-4)^2=6^2

Answer 4

(x-0)^2+(y-4)^2=6^2

Answer 5

x=\[\sqrt{20-y ^{2+8y, -\sqrt{20y ^{2+8y}}}}\]

Answer 6

Thankyou @dan815