Răspuns :

Rayzenid

[tex]f:\mathbb{R}\to \mathbb{R},\,\,f(x) = x^2+5[/tex]

[tex]f(-x) = (-x)^2+5 = x^2+5 = f(x)[/tex]

[tex]\Rightarrow f(-x) = f(x) \Rightarrow \boxed{f(x) - f(-x) = 0}[/tex]

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