MCQ Practice Mathematics 📖 x4 - x2 + 1 = 0 হলে, x2 + 1/x2 এর মান কত? A 1 B 2 C 3 D 4 Favorite Practice Add to Book Explanation & Answer Detailed explanations and answers are restricted. Unlock full access by logging in to your account. 🔒 Unlock the detailed explanation and answers Log In / Sign Up