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Sagot :

LOU2771

Réponse:

bonjour,

(3+x)(5+x)

(x+3)(x+5)

x(x+5)+3(x+5)

x²+5x+3(x+3)

x²+5x+3x+15

x²+8x+15

(4+3x)(6-x)

(3x+4)(-x+6)

3x(-x+6)+4(-x+6)

3x²+18x+4(-x+6)

-3x²+18x-4x+24

-3x²+14x+24

bonne journée :)

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