If we solve the equation 2x / (x + 1) = A / (x + 2) + 1 / (x ^ 2 + 3x + 2), there will be an increasing root?

If we solve the equation 2x / (x + 1) = A / (x + 2) + 1 / (x ^ 2 + 3x + 2), there will be an increasing root?

2x/(x+1)=a/(x+2)+1/[(x+2)(x+1)]
Multiply both sides of the equation by (x + 2) (x + 1) to get: 2x (x + 2) = a (x + 1) + 1
Root increment can only be - 1 or - 2
Substituting x = - 1 into the above formula, we can get: - 2 (- 1 + 2) = 1, which is inconsistent
Substituting x = - 2 into the above formula, we get 0 = - A + 1, we get a = 1
So it can only be a = 1