EXERCICES : CALCUL LITTERAL Réduire les expressions suivantes A = 3x²- 2x + 7- x²+ 6x - 12 ; B = 3(x-5) + 3x-7 + 6(x-2) ; C = 4x – 2x²+ 6x + x²- (x+8) . Dévelop

Bonsoir,

Réduire les expressions:

A = 3x² - 2x + 7 - x² + 6x - 12

A = 3x² - x² - 2x + 6x + 7 - 12

A = 2x² + 4x - 5

B = 3(x - 5) + 3x - 7 + 6(x - 2)

B = 3x - 15 + 3x - 7 + 6x - 12

B = 3x + 3x + 6x - 15 - 7 - 12

B = 12x -34

C = 4x - 2x² + 6x + x² - (x + 8)

C = 4x - 2x² + 6x + x² - x - 8

C = -2x² + x² + 4x + 6x - x - 8

C = -x² + 9x - 8

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Developper:

A = 5(x + 4)

A = 5*x + 5*4

A = 5x + 20

B = 8(x - 6)

B = 8*x + 8*(-6)

B = 8x - 48

C = -2(3x + 8)

C = -2*3x + (-2)*8

C = -6x - 16

D = -6(x - 3)

D = -6*x + (-6)*(-3)

D = -6x + 18

E = -4(3x + 1)

E = -4*3x + (-4)*1

E = -12x - 4

* = multiplication

Bonne soirée.