De remarcat ca:
[tex]-2^{2} = (-1)*(2)^{2} = (-1)*4 = -4[/tex] si
[tex](-2)^{2} = [(-1)*(2)]^{2} = (-1)^{2}*(2)^{2} = 1*4 = 4[/tex] (logic cand te gandesti ca [tex](ab)^{n} = a^{n}b^{n}[/tex])
Atunci avem:
[tex]-2^{2} - (-2)^{2} = -4 - 4 = -8[/tex]
Sper ca te-a ajutat
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