(2х-1)(2х+1)=2(х-3)²+х(2х-3)
4х²-1=2(х²-6х+9)+2х²-3х 4х²-1=2х²-12х+18+2х²-3х 2х²-12х+18+2х²-3х-4х²+1=0 -15х+19=0 15х=19 х=19/15 х=1 4/15