S Shiva Ram 🎓 Master ⭐ 30.44K Points Q. (x – y)(x + y) + (y – z)(y + z) + (z – x) (z + x) is equal to (A) 0 (B) x² + y² + z² (C) xy + yz + zx (D) x + y + z 👁️ Show Answer 💬 Discuss 🔗 Share ✅ Correct Answer: (A) 0