х²-5х+6=х²-2х-3х+6=х(х-2)-3(х-2)=(х-2)(х-3)
2х²+3х+1=2х²+2х+х+1=2х(х+1)+х+1=(х+1)(2х+1)
3х²+5х-2=3х²+6х-х-2=3х(х+2)=(х+2)(3х-1)
х²-5х+6=х²-2х-3х+6=х(х-2)-3(х-2)=(х-2)(х-3)
2х²+3х+1=2х²+2х+х+1=2х(х+1)+х+1=(х+1)(2х+1)
3х²+5х-2=3х²+6х-х-2=3х(х+2)=(х+2)(3х-1)