Multiply: 2a(3a2+4a−1)2a(3a^2 + 4a - 1)2a(3a2+4a−1).
6a3+8a2−2a6a^3 + 8a^2 - 2a6a3+8a2−2a
6a2+8a−26a^2 + 8a - 26a2+8a−2
6a3+4a−16a^3 + 4a - 16a3+4a−1
5a3+6a2−1a5a^3 + 6a^2 - 1a5a3+6a2−1a