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descompuneti in factori 4xla a2 - 1 -2xla a 2 -x
Ofer coroana


Răspuns :

4x² - 1 -2x² -x =
=
(2x - 1)(2x+1)-x(2x+1) =
=(2x+1)(2x - 1-x) =
=(2x+1)(x - 1)