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Sagot :

LAXREEN

Réponse:

A=-xy+1x+3y-3

B=-x^2-x+12

C=2x^3+6x+4

Explications étape par étape:

A=(x-3)(1-y)

A=1×x-x×y-3×1+3×y

A=1x-xy-3+3y

B=(3-x)(4+x)

B=3×4+3×x-x×4-x×x

B=12+3x-4x-x^2

C=(2x+4)(x+1)

C=2x×x+2x×1+4×x+4×1

C=2x^2+2x+4x+4

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