Question

Radius of the circle x^2+y^2-4x+8y+4 is​

Answer 1

it may help you.......

Answer 2

Answer:

r = 4 units

Step-by-step explanation:

Just FYI

x² + y² - 4x + 8y + 4 = 0

(x² - 4x + 4) + (y² + 2(4)y + 16) - 16 = 0

(x - 2)² + (y + 4)² - 16 = 0 ⇒ r = 4 units

Center of circle is at (2, - 4)