because I do not have access to the internal workings of the Wolfram Alpha computational engine, which is the tool I used to evaluate the expression. I can only show you the steps that Wolfram Alpha provides, which are correct and consistent. You can see them by using Bing Chat...
The last portion showing how to do it on Wolfram|Alpha, Excel and GeoGebra give us the same answer as on paper. That is, we can do it with software or without. But once again, we are not even trying to find an "x". we are trying to find the equation of the parabola.Joh...