For instance to complete , take half of 1 and square it (ie to get 0.25. Now add 0.25 inside the parenthesis like this:
Since you really added to the entire left side, we must add to the right side also. Now lets complete
In order to complete , take half of -10 and square it (ie to get 25. Now add 25 inside the parenthesis like this:
Since you really added to the entire left side, we must add to the right side also.