Answer:
[tex] {8}^{( - 9 + 4)} \\ {8}^{ - 5 } \\ \frac{1}{ {8}^{5} } [/tex]
Step-by-step explanation:
Add exponents with same bases being multiplied and when you have a negative exponent you do the reciprocal (flip) and change the exponent to a positive number.
