re..
comme l'autre
= 9 * 3x + 9 * 6 + 4x * 6x + 4x * 1
= 27x + 54 + 24x² + 4x
= 24x² + 31x + 54
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re..
comme l'autre
= 9 * 3x + 9 * 6 + 4x * 6x + 4x * 1
= 27x + 54 + 24x² + 4x
= 24x² + 31x + 54
9(3x+6)+4x(6x+1)
= 27x + 54 + 24x^2+4x
= 24x^2 + 31x + 54