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Nadya
@Nadya
May 2019
1
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Pouvez vous m'aider, je n'y arrive pas.
Merci pour vos explications.
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rosiemuller2000
Verified answer
Coucou
a)
4x²=9
4x²-9=0
(2x-3)(2x+3)=0
revient a resoudre
2x-3=0 ou 2x+3=0
2x=3 ou 2x= -3
x= 3/2 ou x= -3/2
b)
x²=81
x=9 ou x=-9
c)
(4x-1)² =9
(4x-1)²-9=0
((4x-1)-3)((4x-1)+3)=0
(4x-4)(4x+2)=0
revient a resoudre
4x-4=0 ou 4x+2=0
4x=4 ou 4x= -2
x= 1 ou x=-1/2
d)
x²=2
x=2 ou x=-2
voila j espere t avoir aider
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Lista de comentários
Verified answer
Coucoua)
4x²=9
4x²-9=0
(2x-3)(2x+3)=0
revient a resoudre
2x-3=0 ou 2x+3=0
2x=3 ou 2x= -3
x= 3/2 ou x= -3/2
b)
x²=81
x=9 ou x=-9
c)
(4x-1)² =9
(4x-1)²-9=0
((4x-1)-3)((4x-1)+3)=0
(4x-4)(4x+2)=0
revient a resoudre
4x-4=0 ou 4x+2=0
4x=4 ou 4x= -2
x= 1 ou x=-1/2
d)
x²=2
x=2 ou x=-2
voila j espere t avoir aider