Two equal sides of an isosceles triangle are along $- x + 2 y = 4$ and $x + y = 4$. If m is the slope of its third side, then the sum, of all possible distinct values of $m$, is : (1) $- 2 \sqrt { 10 }$ (2) 12 (3) 6 (4) $-6$
Two equal sides of an isosceles triangle are along $- x + 2 y = 4$ and $x + y = 4$. If m is the slope of its third side, then the sum, of all possible distinct values of $m$, is :\\
(1) $- 2 \sqrt { 10 }$\\
(2) 12\\
(3) 6\\
(4) $-6$