Réponse :
salut
C= -3x+5-7x+2x-6x-6
= -3x-7x+2x-6x+5-6
= -14x-1
D= 4x-5+6x²+4-2x²-x+x²-7x
= 6x²-2x²+x²+4x-x-7x-5+4
= 5x²-4x-1
K= 5x-(2x-3)
= 5x-2x+3
=3x+3
L=3x²-(4x²-x+5)
= 3x²-4x²+x-5
= -x²+x-5
O= (6a+8)-(4a+2)
= 6a+8-4a-2
= 2a+6
M=4+6x-(-2x+7)
= 4+6x+2x-7
=8x-3
N=-5x-(-5x²+x-1)
= -5x+5x²-x+1
= 5x²-6x+1
P= (7b-2)+(3b-5)
= 7b-2+3b-5
= 10b-7
Explications étape par étape
