Question

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.

Answer 1

a) (6x² - 1)(2x - 2) = 12x³ -12x -2x + 2 = 12x³ - 14x +2
b) (x -3)(x² -2x +2) = x³ -2x² +2x -3x² +6x - 6 = x³ -5x² +8x - 6
c) (3x -5)(3x +5) = 9x² -25
d) (x² -5x +6)(x² - 5x +4) = 2x² -5x³ +4x² -5x³ +25x² -20x +6x² -30x +24 = 37x² -10x³ -50x +24
e) (x² +2x -6)(2x² -x -3) = 2x la a patra -x³ -3x² +4x³ -2x² -6x -12x² +6x +18 = 2x la a patra +3x³ -17x² +18