Find roots of the equation by quadratic formula :
`x^(2)+x-(a+2)(a+1)=0`

Explanation

To find the roots of the quadratic equation \( x^2 + x - (a+2)(a+1) = 0 \) using the quadratic formula, we will follow these steps:

### Step 1: Identify coefficients
The standard form of a quadratic equation is \( ax^2 + bx + c = 0 \). From our equation, we can identify:
- \( a = 1 \) (coefficient of \( x^2 \))
- \( b = 1 \) (coefficient of \( x \))
- \( c = -(a+2)(a+1) \) (constant term)

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