Question

sa se arate ca 6x3^10+3^11 este cub perfect.

Answer 1

2x3x3^10+3^11=
2x3^11+3^11=
3^11(2+1)=
3^11x3=
3^12=
(3^4)^3=
81^3=> cub

Answer 2

$3*2*3^{10}+3^{11}=3^{11}*2+3^{11}=3^{11}*(2+1)=3^{11}*3=3^{12}=27^4$