Identities-3

today we took a more back door approach to concept of identities, we solved a few problem, but rather than using formulas we used our knowledge of previous units over the years. We also did some work with extraneous solutions and squareroots and powers. the thing to remember with a root problem is that there is going to be a plus andminus solution. this happpens cause in a square problem there two negatives will equal to what two positives equal. *sigh* now there a mouthful. anyways when you get you answere you will have to check all over them, cause some wont work, but seem to work.