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a fost răspuns

Simplificati fractiile

a) x²-2x+1/ x²-1
b) (x²+3x+1) inmultit (x²+3x+3)+1/(x²+3x+1)²-1

Răspuns :

HawkEyed
a) = (x -1) (x -1 ) / (x-1) (x+1) = x-1/ x+1

b) = (x^2 + 3x + 1) ( x^2 +3x +3 ) + 1  / ( x^2 +3x +1) ( x^2 + 3x +1) -1 =
       = x^2 +3x +3 +1 / x^2 +3x + 1 -1 = x^2 + 3x + 4 / x^2 + 3x

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