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Q: If the equation x² + y² +(c – 2)xy – 4x – 4y + c² = 0 represents a circle, then its radius is यदि समीकरण x² + y² + (c – 2)xy – 4x – 4y + c² = 0 एक वृत्त निरूपित करें, तो इसकी त्रिज्या है
  • A. 1
  • B. 2
  • C. 3
  • D. 5
Correct Answer: Option B -
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Explanations:

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