Respuesta :

Correct answer is option B

The solution is listed below:

[tex](-10 x^{3}+4x+5)+(5 x^{2} -2x) \\ \\ = -10 x^{3}+4x+5+5 x^{2} -2x \\ \\ =-10 x^{3}+5 x^{2} +2x+5[/tex]