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+a= x+ax-2y-2a= 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+a
= x+ax-2y-2a
= x(1+a)-2y(1+a
= (x-2y)(1+a)