· a3 + b3 = (a + b) (a2- ab +b2) a3 - b3 = (a - b) (a2 + ab +b2) Example - 27 Take the cube root...
13
· a3 + b3 = (a + b) (a2- ab +b2) a3 - b3 = (a - b) (a2 + ab +b2) Example - 27 Take the cube root of each of the two terms e first factor is the two cube roots with the same sign