a) х(3у-1)-у(х-3)-2(ху-х+у) = 3xy-x-xy+3y-2xy+2x-2y = x+y
Б) 3(а^2-а+3)-0,5а(4а-6) = 3a^2-3a+9-2a^2+3a = a^2+9
a) х(3у-1)-у(х-3)-2(ху-х+у) = 3xy-x-xy+3y-2xy+2x-2y = x+y
Б) 3(а^2-а+3)-0,5а(4а-6) = 3a^2-3a+9-2a^2+3a = a^2+9