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Bonjour, pouvez-vous m’aider pour mon exercice de mathématiques

Développe et réduire les expressions suivante :

A= −2 (−6 x + 5)
B= 7 x (3 x − 8)
C= −10(−10x + 3)
D= 6 (9 x − 2)
E= (−8 x − 10) × (−4 x)
F= 10 (3 x + 7)
G= (6 x − 6) × x
H= 7 x (−4 x − 9)
I= (−2 x + 5) (7 x + 1)
J= (x − 9) (x − 3)
K=(−2x−2)(2x−1)
L= (7 x + 1) (5 x + 5)
M= (5 x − 2) (7 x − 7)
N=(8x+4)(−5x+1)

Merci beaucoup de votre aide

Sagot :

A=12x-10
B=21-56
C=100x-30
D=54-12
=42
E=24x+40x
=64x
F=30x+70
G=6x^2-6x
H=-28x-63
I=-14x^2-2x+5
J=x^2 -3x -9x +27
= x^2 -12x + 27
K=-4x^2 +2x -4x +2
= -4x^2 -2x +2
L= 35x^2 +35x +5x +5
= 35x^2 +40x +5
M=35x^2 -35x -14x +14
= 35x^2 -49x +14
N=-40x^2 +8 -20x+4
= -40x^2 -20x +12
^ : c’est a dire exposant (ou puissance)

Bonsoir,

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A = -2(-6x+5)

   = -2*(-6x) -2*5

   = 12x-10

B = 7x(3x-8)

  = 7x*3x + 7x*(-8)

  = 21x² -56x

C = -10(-10x+3)

   = -10*(-10x)-10*3

   = 100x -30

D = 6(9x-2)

   = 6*9x+6*(-2)

   = 54x-12

E = (-8x-10)*(-4x)

  = -8x*(-4x) -10*(-4x)

  = 32x²+40x

F = 10(3x+7)

  = 10*3x+10*7

  = 30x+70

G = (6x-6)*x

   = 6x*x-6*x

   = 6x² -6x

H = 7x(-4x-9)

   = 7x*(-4x)+7x*(-9)

   = -28x²-63x

I = (-2x+5)(7x+1)

  = -2x*7x-2x*1+5*7x+5*1

  = -14x²-2x+35x+5

  = -14x²+33x+5

J = (x-9)(x-3)

   = x*x+x*(-3)-9*x-9*(-3)

   = x²-3x-9x+27

   = x²-12x+27

K = (-2x-2)(2x-1)

   = -2x*2x-2x*(-1)-2*2x+2*(-1)

   = -4x²+2x-4x+2

   = -4x²-2x+2

L = (7x+1)(5x+5)

  = 7x*5x+7x*5+1*5x+1*5

  = 35x²+35x+5x+5

  = 35x²+40x+5

M = (5x-2)(7x-7)

   = 5x*7x+5x*(-7)-2*7x-2*(-7)

   = 35x²-35x-14x+14

   = 35x²-49x+14

N = (8x+4)(-5x+1)

   = 8x*(-5x)+8x*1+4*(-5)+4*1

   = -40x² + 8x - 20x + 4

   = -40x² -12x + 4

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Au plaisir d'avoir aidée :)

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