Z ( 7 z 3 ) July 8, 2019 16 32 64 128 Z 7 z 3 Z 7 )( z 3 )= 0 Z2 z 7 z 3 42 =- 7 z 3 z Z 7 3 z 5 12 2z 27 15 Z 7 1 z 3 Z 2z =- 7 3i z 3 5 x - 7 - 2 Z 9 6 z 7 3 Z = 7 7 z/2+3