Question

X^2y+y^2-30x+221=0 find the radius ​

Answer 1

2

Explanation

Let's complete the square. We get:

(x^2-30x)+y^2+221=0

(x^2-30x+225)+y^2+221-225=0

(x-15)^2+y^2-4=0

(x-15)^2+y^2=4

By analyzing this, we see that the radius is just :
`√(4)`=2