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

User August Bjornberg
by
8.1k points

1 Answer

7 votes

Answer:

This is a Difference of Squares so
(x+1)(x-1) = x^(2) -1

Therefore,
x^(2) -1 > 2 or x>±
√(3).

User Ruty
by
8.2k points
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