1. The previous question involved solving a quadratic equation or analyzing a function (assuming from context). 2. To join this with the previous question, we need to clarify the exact problem or function from the previous step. 3. Since no new problem is provided, we continue from the last known function or equation. 4. If the previous problem was solving $ax^2 + bx + c = 0$, we can summarize the solution steps: - Use the quadratic formula: $$x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}$$ - Calculate the discriminant $\Delta = b^2 - 4ac$. - If $\Delta > 0$, two real roots; if $\Delta = 0$, one real root; if $\Delta < 0$, no real roots. 5. Without a new problem, the best approach is to confirm or extend the previous solution. If you provide the previous problem or function, I can join and continue the explanation accordingly.