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x la a doua -5x-7,descompunere in factori,dau coroana

Răspuns :

[tex]x^{2-5x-7}=x^{-5-5x}[/tex]
[tex]x^{-5-5x} [/tex]se imparte prin [tex]x^{-5}[/tex]
[tex]x^{2-5x-7}=x^{-5}*x^{1+x}[/tex]
[tex]x^{2-5x-7}=x^{-5}*x^{x}*x[/tex]