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simplificati fractia:
a^2+2a-3/a^4-2a^3+2a^2-2a+1


Răspuns :

[tex]= \frac{a^2+3a-a-3}{a^4-2a^3+a^2+a^2-2a+1}= \frac{(a^2+3a)-(a+3)}{(a^4-2a^3+a^2)+(a^2-2a+1)}= \frac{a(a+3)-(a+3)}{a^2(a^2-2a+1)+(a^2-2a+1)} [/tex]
[tex]= \frac{(a-1)(a+3)}{(a^2+1)(a^2-2a+1)}= \frac{(a-1)(a+3)}{(a^2+1)(a-1)^2}= \frac{a+3}{(a^2+1)(a-1)} [/tex]