(m+7)(9m+5)-m(m-2)=9m^2+5m+63m+35-m^2+2m=8m^2+70m+35 не делится на 7
1+p+q+pq= (1+p)+(q+pq)=1(1+p)+q(1+p)=(1+p)(1+q)
при p=1,012 и q=999
(1+1,012)(1+999)=2,012*1000= 2012
(m+7)(9m+5)-m(m-2)=9m^2+5m+63m+35-m^2+2m=8m^2+70m+35 не делится на 7
1+p+q+pq= (1+p)+(q+pq)=1(1+p)+q(1+p)=(1+p)(1+q)
при p=1,012 и q=999
(1+1,012)(1+999)=2,012*1000= 2012