4 2x 2 5x July 8, 2019 16 32 64 128 4 2x 2 5x 1 4 2x 2 5x 3 2x 4 5x 2 3 0 X 4 )( 2x 2 5x 3 2x 4 5x 2 12 0 2x 4 5x 2 12 3x 4 2x 2 5x 2x 4 5x 2 0 4 2x 3 )= 2 5x 5 3x 4 2x 2 5x 1 5 2x 4 )= 2 5x 10 2x 4 18x 2 5x 3 45x 2 4 2x ) 5x 5 2x 2 5x 4 0 discriminant 2x 4 6 - 5x 2