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What Is (a² - b² )
Given: $(a^{2} - b^{2})$
Solution
It is an identity
$a^{2} - b^{2} = (a+b) (a-b)$
$ (a+b) (a-b) = a^{2} - b^{2}$
Proof
$(a+b) (a-b) = a^{2} - b^{2} + ab - ab = a^{2} - b^{2}$
So $a^{2} - b^{2} = (a+b) (a-b)$
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