Just invert it like:

There you have your common denominator! Don't forget to multiply the numerator as well.
Answer:
2x ^7/4
Step-by-step explanation:
Sorry, no explanation.
Answer:

Step-by-step explanation:
Use the negative power rule:


Use multiplication Distributive Property: (xy)^a = x^a y^a.

Use power rule: (x^a)^b = x^ab.

<u>Therefor</u><u>,</u><u> </u><u>the</u><u> </u><u>answer</u><u> </u><u>is</u><u> </u><u>1</u><u>/</u><u>25</u><u>^</u><u>1</u><u>.</u><u>5</u><u> </u><u>b</u><u>^</u><u>9</u>