Answers

2016-06-14T17:32:45+08:00
Letter c does not belong to the group since the rest of the choices are examples of Difference of Two Squares.

Difference of Two Squares
    - as the name states, it is the difference of two squares
     - it is one of the commonly used special products
     - it is in the form a² - b², which can then be factored into (a+b)(a-b)
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