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emmadu49
@emmadu49
June 2021
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c'est le 35 et ne suivez pas la consigne il faut juste que je trouve les lettres pour demain merci
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Omnes
Salut,
a.
3x + 1 = 5 -x
3x + x = 5-1
4x = 4
x = 1
Solution : x = 1
b.
(2x + 1)(x-7) = 0
2x + 1 = 0
2x = -1
x = -1/2
x - 7 = 0
x = 7
Solutions : x = -1/2 ou x = 7
c.
3(4t-5) = 0
12t - 15 = 0
12t = 15
t = 15/12 = 5/4
Solution : t = 5/4
d.
2x - (x-1) = 0
2x - x + 1 = 0
x + 1 = 0
x = -1
Solution : x = -1
e.
y² - 4 = y(y+1)
y² - 4 = y² + y
y² - y² - y = 4
-y = 4
y = -4
Solution : y = -4
f.
2x(x-1) = 0
2x = 0
x = 0
x-1 = 0
x = 1
Solutions : x = 0 ou x = 1
Bonne soirée !
1 votes
Thanks 2
emmadu49
Merci :D❤
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Aider moi svp pour demain
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Lista de comentários
a.
3x + 1 = 5 -x
3x + x = 5-1
4x = 4
x = 1
Solution : x = 1
b.
(2x + 1)(x-7) = 0
2x + 1 = 0
2x = -1
x = -1/2
x - 7 = 0
x = 7
Solutions : x = -1/2 ou x = 7
c.
3(4t-5) = 0
12t - 15 = 0
12t = 15
t = 15/12 = 5/4
Solution : t = 5/4
d.
2x - (x-1) = 0
2x - x + 1 = 0
x + 1 = 0
x = -1
Solution : x = -1
e.
y² - 4 = y(y+1)
y² - 4 = y² + y
y² - y² - y = 4
-y = 4
y = -4
Solution : y = -4
f.
2x(x-1) = 0
2x = 0
x = 0
x-1 = 0
x = 1
Solutions : x = 0 ou x = 1
Bonne soirée !