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To factor "Difference of two squares" :
∞ Get the square root of the first term and last term,then write it as two factors with opposite signs (one negative and one positive)
                       √x² = x and √4 = 2

P.S. Hope that helps ^_^

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Difference of two squares= its factors is sum and and difference of 2 same terms.



(x+3) (x-3)

the additionsame is always in the first
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