Answer:
First write the polynomial
[tex]\qquad\quad {:}\longrightarrow\sf 7-x (2x+1)[/tex]
[tex]\qquad\quad {:}\longrightarrow\sf 7-2x^3-x [/tex]
- Substitute the value of x=-5
[tex]\qquad\quad {:}\longrightarrow\sf 7-2 (-5)^3- (-5)[/tex]
[tex]\qquad\quad {:}\longrightarrow\sf 7-250 +5 [/tex]
[tex]\qquad\quad {:}\longrightarrow\sf -238 [/tex]
