$$\left. \begin{array} { l } { \quad ( x + a ) ( x + b ) = - x ^ { 2 } + ( a + b ) x + a b + f } \\ { \quad ( 1 ) 03 x + 104 } \end{array} \right.$$
$x=\frac{\sqrt{2f}}{2}\text{, }y=104$
$x=-\frac{\sqrt{2f}}{2}\text{, }y=104$
$x=-\frac{\sqrt{2f}}{2}\text{, }y=104$
$x=\frac{\sqrt{2f}}{2}\text{, }y=104\text{, }f\geq 0$
