Question

"b = ( 5 la 62 + 5 la 61 + 5 la 60 ) * 961 cub perfect"

Answer 1

b=$5^{62} + 5^{61} + 5^{60} )*961=$
=$5^{60}*( 5^{2} + 5^{1} + 1 )* 31^{2}=$
=$5^{60}*( 25 + 5 + 1 )* 31^{2}=$
=$5^{60}*31* 31^{2}=$
=$(5^{20}) ^{3}*31^{3}$=
=$(5^{20}*31) ^{3}$
care este cub perfect