[tex]f(x)=x^3-2x^2-73x-70^{}[/tex][tex]f(x)=x^3+x^2-3x^2-3x-70x-70\Rightarrow f(x)=x^2(x+1)-3x(x+1)-70(x+1)\Rightarrow f(x)=(x+1)(x^2-3x-70)\Rightarrow f(x)=(x+1)(x-10)(x+7)_{}[/tex]
Hence
[tex]f(x)=(x+1)(x-10)(x+7)[/tex]
Hence (x+10) is not a factor of f(x).
