Răspuns:
[tex]\bf d = ({7}^{5}\cdot {8}^{19})^{2} \implies \: patrat \: perfct [/tex]
Explicație pas cu pas:
[tex] \bf d = 49^{5} \cdot64^{19} [/tex]
[tex] \bf d = ({7}^{2}) ^{5} \cdot ({8}^{2}) ^{19} [/tex]
[tex]\bf d = ({7}^{5})^{2}\cdot ({8}^{19})^{2} [/tex]
[tex]\bf d = ({7}^{5}\cdot {8}^{19})^{2} \implies \: patrat \: perfct [/tex]
==pav38==