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Calculati:
a) (6x la a doua - 1 )(2x-2 )
b) (x-3)(x la a doua- 2x +2 )
c) (3x-5)(3x+5)
d) ( x la a doua - 5x + 6 )(x la a doua-5x + 4 )
e ) ( x la a doua +2x-6)(2x la doua - x -3 ) .
Va rog , am nevoie urgent.