M 3 4m 2 4 0 July 8, 2019 16 32 64 128 M 4 4m 3 8m 2 8m 4 0 M 4 2m 3 3m 2 4m 4 0 4m 2 3 2m )+ m 2m 4 )= 0 M 4 4m 3 14m 2 20m 25 0 Cho pt x 2 m 3 x 4m 4 0 4 m 4 m 3m 2 m
