Question

1) Fie A ={ 0;-4;25,-64;0,36;0,4;3(27);6}. Determinati multimea 
B={x∈Q | $x^{2}$∈ A

Answer 1

1) Fie A ={ 0;-4;25,-64;0,36;0,4;3(27);6}.
Determinati multimea 
B={x∈Q | ∈ A

B = {0;  5;  0,6}