به صدثانیه خوش آمدید
(a + b)² = a² + 2ab + b²مثال: (3 + 5)² = 3² + 2×3×5 + 5² = 9 + 30 + 25 = 64
(a − b)² = a² − 2ab + b²مثال: (7 − 2)² = 7² − 2×7×2 + 2² = 49 − 28 + 4 = 25
(a + b)(a − b) = a² − b²مثال: (10 + 3)(10 − 3) = 10² − 3² = 100 − 9 = 91
(a + b)³ = a³ + 3a²b + 3ab² + b³مثال: (1 + 2)³ = 1³ + 3×1²×2 + 3×1×2² + 2³ = 1 + 6 + 12 + 8 = 27
(a − b)³ = a³ − 3a²b + 3ab² − b³
