Question

Complete the square to find the standard form for this circle: x^2 + 4x + y^2 + 16y - 20 = 0​

Answer 1

Explanation:

x² + 4x + y² + 16y - 20 = 0

(x² + 4x + 4) + (y² + 16y + 64) - 4 - 64 - 20 = 0

(x + 2)² + (y + 8)² = 88.