-3x(2-x)+(3x+1)(x-2)
упростить
-6х+3х^2+3х^2+х-6х-2=6х^2-11х-2=2*(3х^2-5,5х-1)
-6х+4х+(3х+1)(х-2) -2х+4х+1-2 2х-1