$2 f(x)+3 f(-x)=x^{2}-x+1$ হলে $f(x)$ এর মান কত?

$\frac{1}{5} x^{2}+x+\frac{1}{5}$

$\frac{1}{5} x^{2}-x+\frac{1}{5}$

$\frac{1}{13} x^{2}-x+\frac{1}{13}$

$\frac{1}{5} x^{2}+x-\frac{1}{5}$