Odpowiedź :
Odpowiedź:
[tex]a)\ \ 3(2m-4)+5(3-4m)=6m-12+15-20m=-14m+3\\\\\\b)\ \ 3m(m-4)(5m+2)-m(2m+3)(4-3m)=\\\\=(3m^2-12m)(5m+2)-(2m^2+3m)(4-3m)=\\\\=15m^3+6m^2-60m^2-24m-(8m^2-6m^3+12m-9m^2)=\\\\=15m^3-54m^2-24m-8m^2+6m^3-12m+9m^2=21-6m^3-53m^2-36m[/tex]