One Solution of a Polynomial Equation Is Given $$x ^ { 4 } + 15 x ^ { 3 } + 49 x ^ { 2 } - 15 x - 50 = 0 ; 1$$

Multiple Choice

One solution of a polynomial equation is given. Use synthetic division to find any remaining solutions.
- $$x ^ { 4 } + 15 x ^ { 3 } + 49 x ^ { 2 } - 15 x - 50 = 0 ; 1$$

A) $- 1,5,10$
B) $- 5 , - 1,10$
C) $- 10 , - 5,1$
D) $- 10 , - 5 , - 1$