Find the area of the region enclosed by `y=-5x-x^(2) and y=x` on interval `[-1,5]`

Explanation

To find the area of the region enclosed by the curves \( y = -5x - x^2 \) and \( y = x \) on the interval \([-1, 5]\), we will follow these steps:

### Step 1: Find the points of intersection
To find the points where the curves intersect, we set the equations equal to each other:

\[ -5x - x^2 = x \]
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