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vdhhdvika
@vdhhdvika
January 2021
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Bjr! Ex 1: supprimer les parenthèses puis réduis
Ex2: développe puis réduis chaque expression
Merci!
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gsantha
Verified answer
Bonjour
Exercice 1
P = (-5x + 7) - (8 - 3x) + x
= -5x + 7 - 8 + 3x + x
= -x - 1
Q = 3x - (-5 + x) + (-3x + 3)
= 3x + 5 - x - 3x + 3
= -x + 8
Je te laisse faire le R
Exercice 2
A = 5 (t + 3) + 2 (3t + 4) - (5t - 3)
= 5 * t + 5 * 3 + 2 * 3t + 2 * 4 - 5t + 3
= 5t + 15 + 6t + 8 - 5t + 3
= 6t + 26
B = -3y (2 + 5y) - 4 (1 - 2y) + (3y² - 5y + 3)
= -6y - 15y² - 4 + 8y + 3y² - 5y + 3
= -12y² - 3y - 1
Je te laisse faire le C et le D
Voilà j'espère avoir pu t'aider ^^
1 votes
Thanks 1
vdhhdvika
Le signe * veux dire fois?
gsantha
oui c'est ça
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Verified answer
BonjourExercice 1
P = (-5x + 7) - (8 - 3x) + x
= -5x + 7 - 8 + 3x + x
= -x - 1
Q = 3x - (-5 + x) + (-3x + 3)
= 3x + 5 - x - 3x + 3
= -x + 8
Je te laisse faire le R
Exercice 2
A = 5 (t + 3) + 2 (3t + 4) - (5t - 3)
= 5 * t + 5 * 3 + 2 * 3t + 2 * 4 - 5t + 3
= 5t + 15 + 6t + 8 - 5t + 3
= 6t + 26
B = -3y (2 + 5y) - 4 (1 - 2y) + (3y² - 5y + 3)
= -6y - 15y² - 4 + 8y + 3y² - 5y + 3
= -12y² - 3y - 1
Je te laisse faire le C et le D
Voilà j'espère avoir pu t'aider ^^