4 m 2 16 July 8, 2019 16 32 64 128 M 4 16n 2 M 4 8m 2 16 0 M 4 )( m2 4m 16 M 4 m 2 16 0 M 4 8m 2 16 4 3 m 2 9 16 Roots of m 4 8m 2 16 4 2 m 4 m2=