Solve d 3 1 y 0 July 8, 2019 16 32 64 128 Solve d 3 3d 2 3d 1 y 0 Solve d 3 d 2 d 1 y 0 Solve d 4 2d 3 2d 2 2d 1 y 0 Solve 3 by 3