3 4 1 4x =- 5 6 July 8, 2019 16 32 64 128 3 4 1 4x 7 6x 5 12 x 6x 3 )( 2x 4 )+( 4x 1 )( 5 3x )=- 21 3 6x 5 6 4 4 1 4x 3 4x 1 2 5 4 1 6x 4 5 3 4x =- 1 6x 3 6x 1 )+ 4x 4 3x 1 )- 5 4 + 4 = 6 4 + 4 = 3