[tex]E(x)=\dfrac{25x^2-10x+1}{5x-1}:\dfrac{25x^2-1}{10x+2}=\dfrac{(5x-1)^2}{5x-1}\cdot\dfrac{2(5x+1)}{(5x+1)(5x-1)}=2\\
E(x)=2\; pentru \; x \in \mathbb{R} \setminus \lbrace\pm \dfrac{1}{5}\rbrace\\
2=x+2 \Rightarrow x=0 \; , \; x \in \lbrace {0} \rbrace -solutie[/tex]
