\[3x - 13,\ \ x - 3,\ \ x - 5\]
\[(x - 3)^{2} = (3x - 13)(x - 5)\]
\[- 2x^{2} + 22x - 56 = 0\ \ \ |\ :( - 2)\]
\[x^{2} - 11x + 28 = 0\]
\[x_{1} + x_{2} = 11,\ \ x_{1} \cdot x_{2} = 28\]
\[x_{1} = 7,\ \ x_{2} = 4\]
\[при\ \ x = 7:\ \]
\[8;\ \ 4;\ \ 2.\]
\[при\ \ x = 4:\]
\[\ - 1;\ 1;\ - 1.\]