(5 + х)(х - 1) = 0,
5+х = 0, х-1 = 0,
х1 = -5 х2 = 1,
(5,6 - 2х) * х = 0,
5,6-2х = 0,
-2х = -5,6,
х1 = 2,8 х2 = 0