Answer:
5. [tex](-4)^{5}[/tex]× [tex](-4)^{7}[/tex]
[tex](-4)^{12}[/tex]
[tex]4^{12}[/tex]
A negative base raised to an even power equals a positive.
8. [tex](\frac{2}{3})^{2}[/tex] × [tex](\frac{2}{3})^{6}[/tex]
[tex](\frac{2}{3})^{8}[/tex]
11. [tex](5^{4})^{3}[/tex]
[tex]5^{12}[/tex]
