a rendre cette aprem

g =(3x-2)² +(7x+5)(3x-2)
g = 9x²-12x+4+21x²-14x+15x-10
g = 30x²-11x-6

factoriser

g =(3x-2)² +(7x+5)(3x-2)
g =(3x-2)(3x-2+7x+5)
g =(3x-2)(10x+3)

pour x = 0

g =30x²-11x-6
g = 30(0)² -11(0) -6
g = 0 -0 -6
g = -6

pour x = -1
g = 30x²-11x-6
g = 30(-1)² -11(-1)-6
g = 30(1) +11-6
g= 30 +11 -6
g =35

G = (3x-2)²+(7x+5)(3x-2)
G= 9x²-12x+4+(21x²-14x+15x-10)
G = 30x²-11x-6

2) on met 3x-2 en facteur
G = (3x-2)²+(7x+5)(3x-2)
G = (3x-2)(3x-2+7x+5)
G = (3x-2)(10x+3)

3) 
G = 0
⇔ (3x-2)(10x+3) = 0
⇔ 3x-2= 0 ou 10x+3 = 0
⇔ 3x = 2 ou 10x = -3
⇔ x= 2/3 ou x = -3/10

G = -1
G = 30x(-1)²-11((-1)-6
G = 30+11-6
G = 35