Factorise `x^3-23 x^2+142 x-120`.

Explanation

To factorize the polynomial \( P(x) = x^3 - 23x^2 + 142x - 120 \), we will follow these steps:

### Step 1: Identify the Polynomial
We start with the polynomial:
\[ P(x) = x^3 - 23x^2 + 142x - 120 \]

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