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Bonjour
pouvez vous m’aidez pour ces calculs littéraux ?

A= - 5(-2x + 4)
B= - 3(-6 - 4x)
C= - 4(7 - 5x)
D= (-5x + 4) X 2
E= (2 - 3x) X 3x
F= - 2x (3x + 5)
G= - 4x (-3x + 6)
H= 5x (-4 + 2x)

merci d’avance

Sagot :

TEAMCE

Bonjour,

Calcul littéral :

A = -5(-2x + 4)

A = -5*(-2x) + (-5)*4

A = 10x - 20

B = -3(-6 - 4x)

B = -3*(-6) + (-3)*(-4x)

B = 18 + 12x

B = 12x + 18

C = -4(7 - 5x)

C = -4*7 + (-4)*(-5x)

C = -28 + 20x

C = 20x - 28

D = (-5x + 4) * 2

D = 2*(-5x) + 2*4

D = -10x + 8

E = (2 - 3x) * 3x

E = 3x*2 + 3x*(-3x)

E = 6 - 9x²

E = -9x² + 6x

F = -2x(3x + 5)

F = -2x*3x + (-2x)*5

F = -6x² - 10x

G = -4x(-3x + 6)

G = -4x*(-3x) + (-4x)*6

G = 12x² - 24x

H = 5x(-4 + 2x)

H = 5x*(-4) + 5x*2x

H = -20x + 10x²

H = 10x² - 20x

* = multiplication

Bonne journée.

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