1) х^2 - 6х + 5 =
D = 36 - 20 = 16 ; V D = 4
X1 = ( 6 + 4 ) : 2 = 5
X2 = ( 6 - 4 ) : 2 = 1
X•( X - 5 )•( X - 1 ) = 12•( X - 5 )
2) X•( X - 1 ) = 12
X^2 - X - 12 = 0
D = 1 + 48 = 49 ; V D = 7
X1 = ( 1 + 7 ) : 2 = 4
X2 = ( 1 - 7 ) : 2 = - 3
Ответ : 5 ; 4 ; - 3