Bonsoir,
A= 14x² -4x +35x -10 + 44x² +8x -33x -6
=?
B= -10x² -4x -20x -8 -( -4x² +5x +12x -15)
= -10x² -4x -20x -8 + 4x² -5x -12x -+5
C= 4x² +20x +25 -( 20x² +8x -15x -6)
= 4x² +20x +25 -(20x² -8x +15x +6
Je te laisse faire les opérations .
A= 14x -4x + 35x -10 + 44x +8x -33x -6
= 64x -16
B= -10x²-4x-20x-8-[-4x²+5x+12x-15]
= -10x²-4x-20x-8+4x²-5x-12x+15
= -6x²-41x+7
C= 4x²+10x+10x+25-20x+8x-15x-6
= 4x²-15x+19
Voilà bonne soirée
