6х - 3 - 4 + 8х - 7 = 0
14х - 14 = 0
14х = 14
х = 1
36х^2 - 4x + 45x - 5 = 0
36x^2 - 41x - 5 = 0
41 +- корень{ (41^2 - 4 * 36 * (-5) }
x1,2=----------------------------------------------------
36 * 2
41 + корень (2401) 41+ 49 90 45 9 1
x1=------------------------------------= -----------=----------= ------= 1 -----= 1-----
72 72 72 36 36 4
41 - корень (2401) 41 - 49 -8 -1 1
х2=----------------------------------=-------------= --------= ----- = - ----
72 72 72 9 9