Réponse :
A = 9(x+7) = (9×x) + (9×7)
A = 9x + 63
B = 4(11-x) = (4×11) - (4×x)
B = 44 - 4x
A = (3×x) + (3×8)
A = 3x + 24
D = (x×7) - (x×x)
D = 7x - x²
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Réponse :
A = 9(x+7) = (9×x) + (9×7)
A = 9x + 63
B = 4(11-x) = (4×11) - (4×x)
B = 44 - 4x
A = (3×x) + (3×8)
A = 3x + 24
D = (x×7) - (x×x)
D = 7x - x²