Question

saluttt , ma ajutați va rog? ​

Answer 1

4×0.(4)=4×4/9=16/9=(4/3)²

40×0.0(4)=4×0.(4)=(4/3)²

400×0.00(4)=4×0.(4)=(4/3)²

Deci toti radicalii sint egali intre ei si fiecare are valoarea rad[(4/3)²]=4/3

Acum:

x=25×3×4/3=25×4=100=10²

Deci x este un numar natural patrat perfect.