by Farhana Rahim on 2024-11-17 17:13:12
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Question: x² + y² + z² = 2, xy + yz + zx = 1 হলে, (x + 2y) ² + (y + 2z) ² + (z + 2x) ² এর মান- |
A) 12 |
B) 19 |
C) 16 |
D) 14 |
Correct Answer: 14 |
ব্যাখ্যা: |