Answer
165
Work Step by Step
Plugging in the given values of x and simplifying, we find:
$$2x^4-\frac{1}{9}x^3 \\ 2\cdot \:3^4-\frac{1}{9}\cdot \:3^3=159 \\ 2\left(-3\right)^4-\frac{1}{9}\left(-3\right)^3=165$$
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