MCQ Practice Mathematics 📖 যদি a + b + c = 5 এবং a2 + b2 + c2 = 9 হয়, তবে ab + bc + ca = কত? ক 12খ 16গ 34ঘ 8 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 Previousxy + 2ay + 3ax + 6a2 = ? Nextযদি (x - 1) (x + 2) = 0 হয় তবে x = ?