Sagot :
Exercice 1 : Développer puis réduire si possible.
A = (8x+5) - (6x+2)
A=8x+5-6x-2
A=2x+3
B = (7x-3) - (3x-2)
B=7x-3-3x+2
B=4x-1
Exercice 2 : Simplifier.
C = -4(x+3) + 5(6+x)
C=-4x-12+30+5x
C=x+18
D = (8+2x) x 3+7(3x+7)
D=24+6x+21x+49
D=27x+73
A=(8x+5)-(6x+2)
A=(8x+5)-6x-2
A=8x+5-6x-2
A=2x+3
B = (7x-3) - (3x-2)
B=7x-3-3x+2
B=4x-1
2)
C = -4(x+3) + 5(6+x)
C=-4x-12+30+5x
C=x+18
D = (8+2x) 3+7(3x+7)
D=24+6x+21x+49
D = 27x+73