Question

stim ca 11=a²+b, unde a si b sunt numere naturale. Aflati a si b.

Answer 1

a²+b=11
a²≤11
a≤√11
a≤3,3...
a=0;1;2;3
Daca a=0
0²+b=11
b=11
Daca a=1
1²+b=11
b=10
Daca a=2
2²+b=11
b=7
Daca a=3
3²+b=11
b=2
{a,b}={(0,11);(1,10);(2,7);(3,2)}