4x 2 12x 5x 15 July 8, 2019 16 32 64 128 4x 3 12x 2 5x 15 4x 2 5x 3 15x 4 12x 3 4x 4 12x 3 5x 2 6x 15 0 Factor the expression by grouping 4x 2 12x 5x 15 32x 4 50 4x 3 12x 2 5x 15 4x ^ 2 - 5x - 12 = 45
