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22-04-2020
Mathematics

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Find the product mentally. [(x + 1)(x - 1)]>2

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hohav62390 hohav62390

22-04-2020

Answer:

This is a Difference of Squares so [tex](x+1)(x-1) = x^{2} -1[/tex]

Therefore, [tex]x^{2} -1 > 2[/tex] or x>±[tex]\sqrt{3}[/tex].

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