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Răspuns:
a.) [tex]-2^{2}[/tex] = 4
[tex]-17^{2}[/tex]= 289
[tex]12^{2}[/tex]= 144
[tex]-2^{2}[/tex] = 4
[tex]17^{2}[/tex]= 289
-[tex]12^{2}[/tex]= 144
b.) x= 4 , 1, 7, 0, 11, 6