Răspuns:
[tex] \bf ({{9}^{17}}\cdot{{7}^{2}})^{2} \implies \: patrat \: perfect[/tex]
Explicație pas cu pas:
[tex] \bf {81}^{17} \cdot {7}^{4} = [/tex]
[tex] \bf ({{9}^{2}})^{17}\cdot({{7}^{2}})^{2} = [/tex]
[tex] \bf ({{9}^{17}})^{2}\cdot({{7}^{2}})^{2} =[/tex]
[tex] \bf ({{9}^{17}}\cdot{{7}^{2}})^{2} \implies \: patrat \: perfect[/tex]
