Question

Hello can you please help me posted picture of question

Answer 1

Correct answer is option B

The solution is listed below:

$(-10 x^{3}+4x+5)+(5 x^{2} -2x) \\ \\ = -10 x^{3}+4x+5+5 x^{2} -2x \\ \\ =-10 x^{3}+5 x^{2} +2x+5$