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 +
Question
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
2 Réponse
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1. Réponse chaperontverte
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) -
2. Réponse Raeloeg
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 :)