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Sagot :

Factorisations:

A=(x+4)²

B=(x-5)²

C=(3-x)(3+x)

D=(7x-1)²

E=7(x+1)(x+2)

F=(2x-9)(2x+9)

G=(2x+3)²

H=(7x-6)(7x+6)

I=4x²+16

J=(x+6)(x-4)

K=2(3x-1)²

L=(5x+1)(-x-3)

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