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Home > A2C > Chapter 9 > Lesson 9.1.3 > Problem 9-61

9-61.
  1. Find the center and radius of each circle below. Homework Help ✎

    1. (y − 7)2 = 25 − (x − 3)2

    2. x2 + y2 + 10y = −9

    3. x2 + y2 + 18x − 8y + 47 = 0 Without using a calculator icon

    4. y2 + (x − 3)2 = 1

Center: (3, 7)
Radius: 5

Complete the square.

x2 + (y2 + 10y + 25) = −9 + 25

Center: (0, −5)
Radius: 4

See parts (a) and (b).

See parts (a) and (b).