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Sagot :

Réponse:

a)

[tex]a)3x ^{2} + 4x + 15x + 20 \\ 3x ^{2} + 20x + 20 \\ \\ b)6x ^{2} + 10x + 3x + 5 \\ 6x ^{2} + 13x + 15 \\ \\ c)4x ^{2} + 8x - x - 2 \\ 4x ^{2} + 7x - 2 \\ \\ d)2x ^{2} + 10x - 3x + 15 \\ 2x ^{2} + 7x + 15[/tex]

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