You get dressed in the morning without looking at the colours of the clothes you choose. Your shirts are white or blue, your pan
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We have .
First let us factor the 2 to obtain,
We can now see clearly that the expression inside the parentheses is a difference of two squares.
We now write the 4 as 2². So that we obtain the expression,
Recall that
Hence our expression becomes,
Therefore, when factored completely,
