engineering mathematics MCQ #444

The equation x² + y² - 4x + 6y - 3 = 0 represents a circle. What is its radius?

engineering mathematics MCQ #444

  1. Question 1

    Q1. The equation x² + y² - 4x + 6y - 3 = 0 represents a circle. What is its radius?

    • A) 2
    • B) 3
    • C) 4
    • D) 5

    Answer: 4

    Explanation: Complete the square: (x-2)² + (y+3)² = 16. Radius = √16 = 4.