QuestionJika fungsi $f(x)={ }^{2} \log (x-2)-{ }^{4} \log \left(2 x^{2}-12 x\right.$ $+19)$ memotong sumbu $x$ di $\left(x_{1}, 0\right)$ dan $\left(x_{2}, 0\right)$ maka untuk $x_{1}<x_{2}$ nilai $2 x_{1}-x_{2}=$
A 1 .
B 2 .
C 3 .
D 4 .
E 5 .