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Sagot :

Réponse:

4x-4= 4(x-1)

3x2 + 2x = x(3x+2)

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

(4x-5)(1+2x)-(1+2x)2= (1+2x)(4x-5-1-2x)=(1+2x)(2x-6) = 2(1+2x)(x-3)
a = 4(x-1)
b = x(3x+2)
c = (3-x)(2+4x-1)
= (3-x)(1+4x)
d = (1+2x)(4x-5-1+2x)
= (1+2x)(2x-6)
= (1x+2)2(x-3)
= 2(1x+2)(x-3)

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