10 5x 0 1 July 8, 2019 16 32 64 128 5x 10 - 15 0 5x 10 )( 3x 15 )= 0 10 5x )( x 1 )= 0 5x 10 77x 2 1 )= 0 3x 18 )( 5x 10 )= 0 5x 10 6x 12 )= 0 10 x 5 5 10×0 5