12 4x 0 July 8, 2019 16 32 64 128 12 4x 0 quadratic or not 12 4x 0 solution 12 4x 0 standard form 12 4x 2 0 12 4x x 0 12 4x 3 0 X2 4x 12 0 quadratic formula 5x2 4x 12 0 X2 4x 12 0 дискриминант If 4x 12 0 then x 12 4x x 2 0 4x 12 8 0 2x2 4x 12 0 X2 4x 12 0 виета 3x2 4x 12 0