а) m(n-3)+2(n-3)= m(n-3) + 2(n-3)= n(m+2) - 3(m+2)= (n-3)(m+2)
б) x-2y-a(2y-x)= x-2y-2ay+ax= x+ax-2y-2ay= x(1+a)-2y(1+a)= (x-2y)(1+a)
а) m(n-3)+2(n-3)
= m(n-3) + 2(n-3)
= n(m+2) - 3(m+2)
= (n-3)(m+2)
б) x-2y-a(2y-x)
= x-2y-2ay+ax
= x+ax-2y-2ay
= x(1+a)-2y(1+a)
= (x-2y)(1+a)