Find the critical numbers of tile rational polynomial `(x^2+4x+3)/(x^2-x-20)`.

Explanation

To find the critical numbers of the rational polynomial \(\frac{x^2 + 4x + 3}{x^2 - x - 20}\), we need to determine where the denominator is equal to zero, as these points will create undefined values (or critical points) for the function.

### Step-by-Step Solution:

1. **Identify the Denominator**:
The denominator of the rational polynomial is \(x^2 - x - 20\).

2. **Set the Denominator to Zero**:
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