$4 x 2 12x 15 5 July 8, 2019 16 32 64 128 Solve $4 x 2 12x 15 5 by completing the square 4x 2 12x 15 5 4x 2 12x 15 5 complete the square 4x 2 12x 5x 15 15 x 42000 15 x 4 - 2 15 x 40
