Question

Cum se calculeaza E(x) ?

Answer 1

$E_{(x)} = \frac{ x^{2} -6x+9}{ x^{2} -3x} \cdot \frac{ x^{2} +3x}{ x^{2} -9} = \frac{( x-3)^{2} }{x(x-3)}\cdot \frac{x(x+3)}{(x-3)(x+3)} =1$
asta dupa ce am aplicat formule de calcul si am facut simplificari