x^2+y^2=85

Solution

x^{2} + y^{2} = 85

(a, b) = (0, 0), r = 85

Solution steps

x^{2} + y^{2} = 85

Rewrite

x^{2} + y^{2} = 85

in the form of the standard circle equation

(x - 0)^{2} + (y - 0)^{2} = (85)^{2}

Therefore the circle properties are:

(a, b) = (0, 0), r = 85

(x - 1)^{2} + (y - 2)^{2} = 81

a^{2} + b^{2} = 64

x^{2} + y^{2} + 4 x - 8 = 0

(x + 5)^{2} + y^{2} = 100

x^{2} + (y + 2)^{2} = 25

What is x^2+y^2=85 ?
The solution to x^2+y^2=85 is Circle with (a,b)=(0,0),r=sqrt(85)