engineering mathematics MCQ #436

What is the radius of the circle given by x² + y² - 4x + 6y + 9 = 0?

engineering mathematics MCQ #436

  1. Question 1

    Q1. What is the radius of the circle given by x² + y² - 4x + 6y + 9 = 0?

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

    Answer: 2

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