If 5x + x² > 100, then x is not?

Need this problem solved If 5x + x² > 100, then x is not

These are my answer options I just cannot get them to work logically please help.

A: 10

B: 8

C: 7

D: 9

Answer:

If 5x + x² > 100, then x is not?

Need this problem solved If 5x + x² > 100, then x is not

These are my answer options I just cannot get them to work logically please help.

A: 10

B: 8

C: 7

D: 9

Answer: