If `f(x)=3x^4-5x^2+9,` find `f(x-1)` .

Explanation

To find \( f(x-1) \) for the function \( f(x) = 3x^4 - 5x^2 + 9 \), we will substitute \( x-1 \) into the function. Here are the steps:

### Step 1: Write down the function
The given function is:
\[ f(x) = 3x^4 - 5x^2 + 9 \]

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