Let  $f\left(x\right),g\left(x\right)$ 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 $f\left(g({\alpha }^2-2\alpha )\right)>f\left(g(3\alpha -4)\right)$ is given by