From the graph, we get that there is a double root at x = 2
Then, use an appropriate method such as sums and products of roots or polynomial division (let me know if you need me to demonstrate this) to find the other solution at A.
You would get the factor (2x+1) or solution x = -1/2
Then, interpreting off the graph, the polynomial is < 0 for x = (- ∞ , -1/2]