help me plz I dont know this part.

Answer:
[tex](-4)^{10}[/tex]
Step-by-step explanation:
Using the rule of exponents
[tex]a^{m}[/tex] × [tex]a^{n}[/tex] ⇔ [tex]a^{(m+n)}[/tex] , then
(- 4)[tex](-4)^{9}[/tex]
= [tex](-4)^{1}[/tex] × [tex](-4)^{9}[/tex]
= [tex](-4)^{(1+9)}[/tex]
= [tex](-4)^{10}[/tex]