The rule of multiplication of the exponents is
![a^m.a^n=a^(m+n)](https://img.qammunity.org/2023/formulas/mathematics/college/wj67ngsvn173atm52cq7s3471h0mx3zy0h.png)
We will use this rule with our question
![x^{(5)/(9)}.x^{(2)/(3)}](https://img.qammunity.org/2023/formulas/mathematics/college/k7srq7z1cxftogrlgeejpacuuwh9vso9s9.png)
We must add the fractions 5/9 and 2/3
To add fractions they must have the same denominators
Since the lowest common factor of 9 and 3 is 9, then
![(5)/(9)+(2)/(3)=(5)/(9)+(2*3)/(3*3)=(5)/(9)+(6)/(9)=(11)/(9)](https://img.qammunity.org/2023/formulas/mathematics/college/bn2ev1zo72m86j1dx8d07ydus89g3154ez.png)
Then the expression is
![x^{(5)/(9)}.x^{(2)/(3)}=x^{(5)/(9)+(2)/(3)}=x^{(11)/(9)}](https://img.qammunity.org/2023/formulas/mathematics/college/bjrc9ntnqp933ekyw3vl17uybz3u69s633.png)