SOLUTION: How would I perform this indicated operation? (35a + 13b)(35a - 13b)

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Question 310981: How would I perform this indicated operation?
(35a + 13b)(35a - 13b)

Answer by josmiceli(19441)   (Show Source): You can put this solution on YOUR website!
Think of the process as a simple case:

This is obviously
but you can do it like this also:

All I'm doing is

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