engineering mathematics MCQ #450

Find the radius of the circle x² + y² - 6x + 8y + 9 = 0.

engineering mathematics MCQ #450

  1. Question 1

    Q1. Find the radius of the circle x² + y² - 6x + 8y + 9 = 0.

    • A) 4
    • B) 5
    • C) 6
    • D) 7

    Answer: 5

    Explanation: Complete the square: (x-3)² + (y+4)² = 25. Radius is √25 = 5.