1)=25а^2+2×5а×1,2b+1,44b^2=25a^2+12ab++1,44b^2
2) =36m^8-2×6m^4×(-7n^2)+49n^4=
=36m^8-84m^4n^2+49n^4
3)=(13/6a^3+3b^3)^2=169/36a^6+2×13/6a^3××3b^2+9b^4=169a^6+13a^3b^2+9b^4
4)(5/3x^2-6y^3)^2=25/9x^4-2×5/3x^2×6y^3+
+36y^6=25/9x^4-20x^2y^3+36y^6
1)=25а^2+2×5а×1,2b+1,44b^2=25a^2+12ab++1,44b^2
2) =36m^8-2×6m^4×(-7n^2)+49n^4=
=36m^8-84m^4n^2+49n^4
3)=(13/6a^3+3b^3)^2=169/36a^6+2×13/6a^3××3b^2+9b^4=169a^6+13a^3b^2+9b^4
4)(5/3x^2-6y^3)^2=25/9x^4-2×5/3x^2×6y^3+
+36y^6=25/9x^4-20x^2y^3+36y^6