Expansion - Explanation with Area of Square (Question no. 3)

1 comment:

  1. Ryan:

    The working using the FOIL method is correct. Yes, looks like need to take special care of operations :)

    For the explanation using the area of rectangle, which is the part that represents (x-y)(x-3y)? Please shade that part.

    Then you should also show how to find the "value" of (x-y)(x-3y) by subtracting the various parts from x^2. Please include that working on that area to show how you go about 'subtracting' the parts.

    Please add those parts and post it in this same post.