Ответы и объяснения

2013-09-16T14:32:36+00:00
36 m^2 - m^2 -18 m - 81 =0
35m^2 - 18 m - 81 = 0
D = 324 + 11340 = 11664
D = 108
x1 = 18 - 108 / 70 = - 90 / 70 = - 1.3
x2 = 18+ 108 / 70 = 126 / 70 = 1.8
( x + 1.3) ( x - 1.8) =0