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Sagot :

Réponse :

a. (2b+3)(4a+3) = 8ab + 6b + 12a + 9

b.

[tex](x+y)(2x+3y) = 2x^{2} + 3xy + 2xy + 3y^{2} \\ = 2x^{2} + 3y^{2} + 5xy[/tex]

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