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12 x 15
101 x 29
247 x 9
99 x 17
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23 Développer les expressions suivantes.
A=-3(x + 7)
B = 4(2x - 3)
C=-11(-x – 5)
D = x(2x +9)
E = -3x(6 + 4x)
F=-2x(10 - 5x)
Jules

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Réponse :

A = -3(x + 7) = -3x -21

B = 4(2x - 3) = 8x - 12

C = -11(-x - 5) = 11x + 55

D = x(2x + 9) = 2x² + 9x

E = -3x(6 + 4x) = - 18x - 12x² = - 12x² - 18x

F = -2x(10 - 5x) = - 20x + 10x² = 10x² - 20x

Explications étape par étape

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