Factoring (Sum and Difference of Cubes) a3 + b3 = (a + b)(a2 – ab + b2) a3 – b3 = (a – b)(a2 + ab + b2) Examples: 27y3 + 1 = (3y)3 + (1)3 = (3y + 1)(9y2 – 3y + 1)
Factoring (Sum and Difference of Cubes) a3 + b3 = (a + b)(a2 – ab + b2) a3 – b3 = (a – b)(a2 + ab + b2) Examples: 27y3 + 1 = (3y)3 + (1)3 = (3y + 1)(9y2 – 3y + 1)