Explicație pas cu pas:
e)
[tex] {11}^{15} \div {11}^{13} = {11}^{15 - 13} = {11}^{2} \: \: \: \: patrat \: perfect[/tex]
f)
[tex] {13}^{78} = ({ {13}^{39} })^{2} [/tex]
g)
[tex] {19}^{25} \times {19}^{7} = {19}^{25 + 7} = {19}^{32} = ( { {19}^{16} )}^{2} [/tex]
h)
[tex] {2}^{72} =({ {2}^{36} })^{2} [/tex]
