1)а) -2xy22y−3x+x22y-3x+x22y−3x+x2=-4ху3+6х2у2-2х3у2
б) 3xy2x−3x2+4xy2x-3x2 +4xy2x−3x2+4xy−2y2-2y2−2y2 =-6ху32x−3x2+4xy2x-3x2 +4xy2x−3x2+4xy = -12х2у3+18х3у3-24х2у3
2) 4x2−3x+2x2-3x+2x2−3x+2-22x2−5x+12x2-5x+12x2−5x+1 = 4х2-12х+8-4х2+10х2=6-2х при х=-3 6-2*−3-3−3=6+6=12
1)а) -2xy22y−3x+x22y-3x+x22y−3x+x2=-4ху3+6х2у2-2х3у2
б) 3xy2x−3x2+4xy2x-3x2 +4xy2x−3x2+4xy−2y2-2y2−2y2 =-6ху32x−3x2+4xy2x-3x2 +4xy2x−3x2+4xy = -12х2у3+18х3у3-24х2у3
2) 4x2−3x+2x2-3x+2x2−3x+2-22x2−5x+12x2-5x+12x2−5x+1 = 4х2-12х+8-4х2+10х2=6-2х при х=-3 6-2*−3-3−3=6+6=12