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(x+1) (x-1) (x+1) (x-1)=x^2-1
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(x+1) (x-1)
(x+1) (x-1)=x^2-1

User Klefevre
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1 Answer

3 votes

Answer:

___ ___

X1 = - √2 , x2 = √2

:))

User Shivan
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