(х-3)²-(х+3)²+11(х+1)=-8 х²-6х+9-х²-6х-9+11х+11=-8 -х=-8-11 х=19 (х-4)(х+4)-(х+2)²=3(-х-12) х²-16-х²-4х-4=-3х-36 -4х+3х=-36+20 -х=-16 х=16