Question

dau coroana si ma abonez urgenttt va rog

Answer 1

Sper ca e corect. la 3 Nu sunt sigură!!

Answer 2

2 a)
${3}^{20} \div {3}^{18} \times {3}^{5} - {3}^{7} = {3}^{2} \times {3}^{5 } - {3}^{7} = {3}^{7} - {3}^{7} = 0$
b) {[(45+42-24):5+9-(42-4-36)]}=
{[(87-24):5+9-(38-36)]}=
[(63:5+9-2)]=
(12,6+9-2)=
(8,6-2)=
6,6