Factorize: `(x+2)(x^2+25)-10 x^2-20 x`

Explanation

To factorize the expression \( (x+2)(x^2+25)-10x^2-20x \), we will follow these steps:

### Step 1: Expand the expression
Start by expanding the expression \( (x+2)(x^2+25) \):
\[ (x+2)(x^2+25) = x(x^2+25) + 2(x^2+25) = x^3 + 25x + 2x^2 + 50 \]
So, we have:
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