bonsoir,
A = (3x-4)²
= 9x² -24x +16
IR
D= (3x-2) (7x-4)
= 21x² -12x -14x +8
= 21x² -26x +8
G = 7(2-5x) + 4x(2x - 5)
= 14 -35x +8x² -20x
= 8x² -55x +14
B= (7x+2) (7x-2)
= 49x² -4
IR
E= 5(3x - 2)
= 15x -10
C = (5x+ 1)²
= 25x² +10x +1
IR
F =-3x(5x-2)
= 15x² -6x