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kiwimiams
@kiwimiams
January 2021
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Bonsoir ces équations sont vraiment très dur et je crois que j'ai fait n'importe quoi donc svp aider moi ☺️
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swnn
1. 5x=8+7
5x=15
x=15/5=3
2. (1/3)-2x=(1/6)-x
-2x+x=(1/6)-(1/3)
-x=(1/6)-(2/6)
-x=-1/6
x=1/6
3. x²+4x-1=(x-1)(x-2)
x²+4x-1= x²-2x-x+2
x²+4x-1= x²-3x+2
4x+3x=2+1
7x=3
x=3/7
4. (5/3)x+(1/5)=(2/3)x-(1/5)
(5/3)x-(2/3)x=-(1/5)-(1/5)
3/3x=-2/5
x=-2/5
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Bonjours svp je ne comprends pas ces exercice tous je que je sais c'est qu'il faut le faire avec les identitter remarquable ou un chiffre commun.Svp si vous m'aider m'etait le calcul qui explique le resultat merci d'avance....
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5x=15
x=15/5=3
2. (1/3)-2x=(1/6)-x
-2x+x=(1/6)-(1/3)
-x=(1/6)-(2/6)
-x=-1/6
x=1/6
3. x²+4x-1=(x-1)(x-2)
x²+4x-1= x²-2x-x+2
x²+4x-1= x²-3x+2
4x+3x=2+1
7x=3
x=3/7
4. (5/3)x+(1/5)=(2/3)x-(1/5)
(5/3)x-(2/3)x=-(1/5)-(1/5)
3/3x=-2/5
x=-2/5