Which of the following equations represents a circle with a center at (3, -2) an

Practice Questions

Q1
Which of the following equations represents a circle with a center at (3, -2) and a radius of 5?
  1. (x - 3)² + (y + 2)² = 25
  2. (x + 3)² + (y - 2)² = 25
  3. (x - 3)² + (y - 2)² = 25
  4. (x + 3)² + (y + 2)² = 25

Questions & Step-by-Step Solutions

Which of the following equations represents a circle with a center at (3, -2) and a radius of 5?
  • Step 1: Identify the center of the circle, which is given as (3, -2). Here, h = 3 and k = -2.
  • Step 2: Identify the radius of the circle, which is given as 5. So, r = 5.
  • Step 3: Use the standard form of a circle's equation: (x - h)² + (y - k)² = r².
  • Step 4: Substitute h and k into the equation: (x - 3)² + (y - (-2))² = r².
  • Step 5: Simplify the equation: (x - 3)² + (y + 2)² = r².
  • Step 6: Substitute r = 5 into the equation: (x - 3)² + (y + 2)² = 5².
  • Step 7: Calculate 5², which is 25: (x - 3)² + (y + 2)² = 25.
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