A ^ 3 + 3A ^ 2-2a factorization help, thank you

A ^ 3 + 3A ^ 2-2a factorization help, thank you

A & # 179; + 3A & # 178; - 2A = a (A & # 178; + 3a-2) = a [a + (- 3 + root 17) / 2] [a + (3 + root 17) / 2]