А) 10(x-2y)+2(x+y)=10х-20у+2х+2у=12х-18у
Б)-3(x+y)+3(y-x)=-3х-3у+3у-3х=-6х
В)y(y-3)+4(y+2)=у²-3у+4у+8=у²+у+8
Г)-y(y-5)+5(1-y)=-у²+5у+5-5у=-у²+5у
А) 10(x-2y)+2(x+y)=10х-20у+2х+2у=12х-18у
Б)-3(x+y)+3(y-x)=-3х-3у+3у-3х=-6х
В)y(y-3)+4(y+2)=у²-3у+4у+8=у²+у+8
Г)-y(y-5)+5(1-y)=-у²+5у+5-5у=-у²+5у