Frequent Questions about our Solver

The problem

Click to see the original problem

I can`t undestand from 2x^2 - 2x - 1 to 2x^2 -2x + x-1.

I also can't understand from 2x(x^2-1-1) + (x-1) to (x-1)(2x+1)

Answer provided by our tutors

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.

For the second, we just pull (x-1) in front of the brackets: 

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.

Applying "Show: a lot of steps" will display more step by step solution:

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