Otvette пж пж пж пж очень срочно

[latex]1)49m^2(n+8m)^2=49m^2(n^2+16mn+64m^2)=49m^2n^2+784m^3+[/latex] [latex]+3136m^4.[/latex] [latex]2) (5x-3y)^2-16x^2=25x^2-xy+9y^2+16x^2=41x^2-30xy+9y^2[/latex]