สรุป สูตรการแยกตัวประกอบ ทั้งหมด
a² – b² = (a + b)(a – b)
(a + b)² = a² + 2ab + b²
(a – b)² = a² – 2ab + b²
a³ + b³ = (a + b)(a² – ab+ b²)
a³ – b³ = (a – b)(a² + ab + b²)
(a + b)³ = a³ + 3a²b + 3ab² + b³
(a – b)³ = a³ – 3a²b+ 3ab² – b³
a² – b² = (a + b)(a – b)
(a + b)² = a² + 2ab + b²
(a – b)² = a² – 2ab + b²
a³ + b³ = (a + b)(a² – ab+ b²)
a³ – b³ = (a – b)(a² + ab + b²)
(a + b)³ = a³ + 3a²b + 3ab² + b³
(a – b)³ = a³ – 3a²b+ 3ab² – b³