1) (х-2)(х-7) = 0
х²-7х-2х+14 = 0
х²-9х+14 = 0
2) (х-(-3))(х-5) = 0
(х+3)(х-5) = 0
х²-5х+3х-15 = 0
х²-2х-15 = 0
3) (х-(-1))(х-4) = 0
(х+1)(х-4) = 0
х²-4х+х-4 = 0
х²-3х-4 = 0
1) (х-2)(х-7) = 0
х²-7х-2х+14 = 0
х²-9х+14 = 0
2) (х-(-3))(х-5) = 0
(х+3)(х-5) = 0
х²-5х+3х-15 = 0
х²-2х-15 = 0
3) (х-(-1))(х-4) = 0
(х+1)(х-4) = 0
х²-4х+х-4 = 0
х²-3х-4 = 0