4 2x 5 )= 12 4x July 8, 2019 16 32 64 128 2x 1 4 5 4x 12 3x x 12 6x 4 5 2x 4x 2x 4 7x 12 5 x 14 4x 4x ^ 2 - 5x - 12 = 12