Объяснение:
1) (m + n)^2=m^2+2mn+n^2
4) (2 + n)^2=4+4n+n^2
2) (n - m)^2;=n^2-2mn+m^2
5) (2m + n)^2=4m^2+4mn+n^2
3) (1 - m)^2=1-2m+m^2
6) (m - 2n)^2=m^2-4mn+4n^2
Объяснение:
1) (m + n)^2=m^2+2mn+n^2
4) (2 + n)^2=4+4n+n^2
2) (n - m)^2;=n^2-2mn+m^2
5) (2m + n)^2=4m^2+4mn+n^2
3) (1 - m)^2=1-2m+m^2
6) (m - 2n)^2=m^2-4mn+4n^2