4 2 5x 5 July 8, 2019 16 32 64 128 2 4 2x ) 5x 5 4 5x 2 5 )+ 5x 8 4 x 2 )- 5 5x X 4 5x 2 5 0 4 5x 2 )=- 5 5x 3 3x 2 4 5x )= 5 3x 4 2x 3 )= 2 5x 5 4 5x 2 5x 3 4x 2 )( 4 5x 5 (- 5x 4 2 5x ) x 3 4 5x 3 )= 2 5x 14 4 5x 1 )-( 2 5x 1 Y 2 5x 4 5 X 2 4 5x 1 5 4 5x 2 5x 2 =- 10