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Jujustine26
@Jujustine26
May 2019
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Bonjour c'est urgent.
Je dois développer et réduire (simplifier) des calcul littéral mais je n'ai pas saisi comment faire merci de m'aider les calcul sont en dessous :
A= -3x (6+4x)
B= (1-2x)(10-5x)
C= (5y-7)(x-2)-4x (5+y)
Merci de votre aide. :)
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nadiab
A= -3x (6+4x)
A= -18x-12x²
B= (1-2x)(10-5x)
B= 10-20x-5x+10x²
B= 10x²-25x+10
C= (5y-7)(x-2)-4x (5+y)
C= 5xy-7x-10y-20x-4xy
C= -27x-10y+xy
1 votes
Thanks 0
jujustine26
Merci à toi. ;)
Commentaires (2)
Salut
A= -3x (6+4x)
= -3x*6+-3x*4x
= -18x+12x²
B= (1-2x)(10-5x)
= 1*10-1*5x - 2x*10 - 2x*5x
= 10 - 5x - 20x - 10x²
= 10 - (-15x) - 10x²
= 10 + 15x - 10x²
C= (5y-7)(x-2)-4x (5+y)
= 5y*x-5y*2-7*x-7*2 - 4x*5+4x*y
= 5yx- 10y - 7x - 14 - 20x + 4xy
= 5xy + 4xy - 7x - 20x - 10y - 14
= 9 xy - 27x - 10y - 14
voila un merci c'est tout ce que je demande
j'espere t'avoir aider
1 votes
Thanks 0
jujustine26
Merci ;)
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A= -18x-12x²
B= (1-2x)(10-5x)
B= 10-20x-5x+10x²
B= 10x²-25x+10
C= (5y-7)(x-2)-4x (5+y)
C= 5xy-7x-10y-20x-4xy
C= -27x-10y+xy
A= -3x (6+4x)
= -3x*6+-3x*4x
= -18x+12x²
B= (1-2x)(10-5x)
= 1*10-1*5x - 2x*10 - 2x*5x
= 10 - 5x - 20x - 10x²
= 10 - (-15x) - 10x²
= 10 + 15x - 10x²
C= (5y-7)(x-2)-4x (5+y)
= 5y*x-5y*2-7*x-7*2 - 4x*5+4x*y
= 5yx- 10y - 7x - 14 - 20x + 4xy
= 5xy + 4xy - 7x - 20x - 10y - 14
= 9 xy - 27x - 10y - 14
voila un merci c'est tout ce que je demande
j'espere t'avoir aider