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x²-10x+25/x²-25 * x/x-5 + 5/x+5

Dau coroana!


Răspuns :

(x²-10x+25)/(x²-25) * x/(x-5)  + 5/(x+5)=
=
(x-5)²/(x-5)(x+5) * x/(x-5)  + 5/(x+5)=
=x/(x+5)  + 5/(x+5)=
=(x+5)/(x+5)=1