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Thread: help with difference of square?

  1. February 13th 2011, 01:14 PM #1
    antikv
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    help with difference of square?

    does [7-(5+x)][7+(5-x)]=[49-(5+x)^2]?


    Thanks in advance.
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  2. February 13th 2011, 01:22 PM #2
    Plato
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    Quote Originally Posted by antikv View Post
    does [7-(5+x)][7+(5-x)]=[49-(5+x)^2]?
    a^2-b^2=[a-b][a+b] where a=7~\&~b=(5+x)
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