How is a^2-b^2 = (a+b)(a-b)

IMG_20160826_155038

Assuming a=5b

IMG_20160826_155312

 

Ideally we should take a=kb where k need not be an integer. However for simplicity I have taken k=5.  You can try it with other values and see if it works.

Note:  The incompetent writer welcomes any form of criticism ranging from mild mockery to heart-wrenching insults.

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