- #1

- 75

- 0

## Homework Statement

determine if whether it's circle or not , if yes find the center and radius

1) 2x^2 + 2y^2 - 5x + 4y - 1 =0

2) x^2 + y^2 + 4x + 8y + 25 =0

## The Attempt at a Solution

1) center (5/4,-1)

2) center (2,4)

well i need help in how to find the " radius " and how to know if it's circle equation or not ,,,