A) -2x*4-7x*3=-8x-21x=x(-8-21)
B) x*x-6²= (x-6)(x+6)
C) 2-7x-4x²+10x-x=-4x²+2x+2=(-2x+2)(2x+1)
D)-7y²+5y+3y-y=-7y²+7y=y(7y+7)
E) (3x+4)+(11x-7)=3x+4+11x-7=14x-3
F) 3-2x-(3x-12)=3-2x-3x+12=-5x+15=5(-x+3)
b) G)(2x+5*8+3x)=2x+40+3x=5x+40=5(x+8)
H)(x-4*7x-6)=(x-28x-6)=-27x-6
c) I) 3(x-1/5)
pour x=2
3(2-1/5)=3(10/5-1/5)=27/5
pour x=2/3 ( je crois que c 'est trois car on voit pas le chiffre)
3(2/3-1/5)=3(10/15-3/15)=21/5
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Verified answer
Bonsoira = - 8 x - 21 x = - 29 x
d = - 4 y² + 4 y
b = - 4 x² + 2 x + 2
e = 33 x² - 21 x + 44 x - 28 = 33 x² + 23 x - 23
f = 3 - 2 x - 3 x + 12 = - 5 x + 15
g = 2 x + 40 + 3 x = 5 x + 40
h = x - 28 x - 6 = - 27 x - 6
i = 3 ( x - 1/5)
i = 3 x - 3 /5
pour x = 2 , i = 6 - 3/5 = 30/5 - 3/5 = 27/5
/pour x = 2/3 , i = 6/3 - 3/5 = 30/15 - 9/15 = 21/15
A) -2x*4-7x*3=-8x-21x=x(-8-21)
B) x*x-6²= (x-6)(x+6)
C) 2-7x-4x²+10x-x=-4x²+2x+2=(-2x+2)(2x+1)
D)-7y²+5y+3y-y=-7y²+7y=y(7y+7)
E) (3x+4)+(11x-7)=3x+4+11x-7=14x-3
F) 3-2x-(3x-12)=3-2x-3x+12=-5x+15=5(-x+3)
b) G)(2x+5*8+3x)=2x+40+3x=5x+40=5(x+8)
H)(x-4*7x-6)=(x-28x-6)=-27x-6
c) I) 3(x-1/5)
pour x=2
3(2-1/5)=3(10/5-1/5)=27/5
pour x=2/3 ( je crois que c 'est trois car on voit pas le chiffre)
3(2/3-1/5)=3(10/15-3/15)=21/5