Răspunsuri

2014-04-02T17:32:37+03:00
In primul caz:  x^{2} -4=0 =>  x^{2} =4 =>x={-2,2}
al doilea caz: 9- x^{2} =0 =>  x^{2} =9=>x={-3,3}
=> S={-3,-2,2,3}