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Sagot :

MCKENNA

Réponse:

salut

alors pour le niveau 1:

3x+3 = 3(x + 1)

niveau 2:

(x+1)(4x-9)- 5(x + 1)=

(x+1)(4x-9-5)=

(x+1) (4x -14)

niveau 3:

(x+1)(9x-5)-7x-7=

(x+1)(9x-5)-7(x+1)=

(x+1)(9x-5-7)=

(x+1)(9x-12)

niveau 4:

2(x+1)(x-4)+3(x+1)(x+8)=

(x+1) [2(x-4)+3(x+8)]=

(x+1) (2x-8+3x+24)=

(x+1) (5x+16)

niveau 5:

7(x+1)(2x+1)-2(x+1)(3x-4)=

(x+1) [7(2x+1)-2(3x-4)]=

(x+1) (14x+7-6x+8)=

(x+1) (8x+15)

niveau 6:

(x+1)²+x+1=

(x+1)[(x+1)+1]=

(x+1) ( x+2)

niveau 7:

3x²-3+x+1=

3(x²-1)+(x+1)=

3[(x-1)(x+1)] +(x+1)=

(x+1) [3(x-1) +1 ]=

(x+1) (3x-3+1)=

(x+1) (3x-1)

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