3x 12x 2 x 4 0 July 8, 2019 16 32 64 128 3x 3 x 2 12x 4 0 X 4 4x 3 3x 2 12x 0 3x 2 8x 4 )( x 2 4 )+ 12x 4 0 3x2 - 12x + 4 = 0 12 4+3x-x2 ≤0