Answer:
-65/81
Step-by-step explanation:
[tex]( \frac{2}{3} ) {}^{x} ( \frac{2}{3} ) {}^{4} - ( \frac{2}{3} ) {}^{x} [/tex]
[tex] (\frac{2}{3} ) {}^{x} ( \frac{16}{81} - 1)[/tex]
[tex]( \frac{2}{3} )( \frac{ - 65}{81} )[/tex]
