Let  $\text{f}\left(\text{x}\right)$ , $\text{g}\left(\text{x}\right)$  be two continuous functions defined from  $R\to R$ , such that  $f\left(x_1\right)>f\left(x_2\right)$  and  $g\left(x_1\right)<g\left(x_2\right),\forall x_1>x_2$   . Then the complete solution set of $\alpha$ such that   $f\left(g({\alpha }^2-2\alpha )\right)>f\left(g(3\alpha -4)\right)$  is given by