Write the standard form of the cirlcle. X^2 +4x +y^2-8y -5=0

Answer 1

x^2 + 4x + 4 + y^2 - 8x + 16 - 5 = 20 <--- completes the square

(X+2)^2 + (y-4)^2 = 25

the center is at (-2,4) and has radius 5

Answer 2

x² + 4x + y² - 8y = 5