Разложите на множетели : 1) х (а-b)+y (b-a) 2)2m (x-y)-y+x 3)m^2 (a-2)+n (2-a) 4)2n (x--x)

1) x(a-b) + y(b-a)= x(a-b) -y (a-b)=(a-b) (x-y)

2) 2m (x-y) -y+x= 2m (x-y) -(x-y) = (x-y) (2m-1)

3) m^2 (a-2) +n (2-a) = m^2(a-2) -n (a-2) = (a-2) (m^2 -n)