2. The situation of real roots of the equation $\frac{1}{x}-2=x^{2}-2 x$ is $(\quad)$.
(A) It has three real roots
(B) It has only two real roots
(C) It has only one real root
(D) It has no real roots
(Hint: In the same coordinate system, draw the graphs of $y_{1}=\frac{1}{x}$ and $y_{2}=(x-1)^{2}+1$. Obviously, the two graphs have only one intersection point in the first quadrant.)