The problem
my confusion is in simplifying the steps, the sign changed from , to .making the equation negative. after that I think I've got it but I would have missed making that one step
Answer provided by our tutors
If you are not satisfied with the number of solution steps displayed (either too many steps or too few), click on the Options button to adjust the number of steps to be shown. By applying show a lot of steps you will get the bellow, more step by step, solution.
You can obtain an explanation for any step by clicking on it. Please note that you cannot click on the very first expression, which is the original problem. Quite often, several transformations will be performed within the same step. Use the explanation navigation buttons to step through all of them:
Another way to solve the inequaltiy is by selecting the "Graph" tab.
This way you will also get a graphed solution:
