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melisusta
@melisusta
January 2021
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Bonsoir, pouvez vous maider svp ? Question c, d , e , f
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maudmarine
Verified answer
Bonsoir,
c)
f (x) = (2x + 3) (x - 4)
f (x) = 2x² - 8x + 3x - 12
f (x) = 2x² - 5x - 12
d)
f (3) = (2x + 3) (x - 4)
f (3) = (2 * 3 + 3) (3 - 4)
f (3) = (6 + 3) (- 1)
f (3) = 9 * (- 1)
f (3) = - 9
f (- 2) = (2x + 3) (x - 4)
f (- 2) = (2 * (- 2) + 3) (- 2 - 4)
f (- 2) = (- 2 + 3) (- 6)
f (- 2) = 1 * (- 6)
f (- 2) = - 6
e)
g (x) = 2x (2x - 5) - 3 (8 - x)
g (x) = 4x² - 10x - 24 + 3x
g (x) = 4x² - 7x - 24
f (x) ≠ g (x)
h (x) = - 12 + x (2x - 5)
h (x) = - 12 + 2x² - 5x
h (x) = 2x² - 5x - 12
f (x) = h (x)
2 votes
Thanks 3
melisusta
Merci bcp !
ptchat55
Bonsoir voici ce que je pense la réponse
1)
f (x) = (2x + 3) (x - 4)
f (x) = 2x² - 8x + 3x - 12
f (x) = 2x² - 5x - 12
2)
f (3) = (2x + 3) (x - 4)
f (3) = (2 * 3 + 3) (3 - 4)
f (3) = (6 + 3) (- 1)
f (3) = 9 * (- 1)
f (3) = - 9
3/
f (- 2) = (2x + 3) (x - 4)
f (- 2) = (2 * (- 2) + 3) (- 2 - 4)
f (- 2) = (- 2 + 3) (- 6)
f (- 2) = 1 * (- 6)
f (- 2) = - 6
4/
g (x) = 2x (2x - 5) - 3 (8 - x)
g (x) = 4x² - 10x - 24 + 3x
g (x) = 4x² - 7x - 24
f (x) ≠ g (x)
h (x) = - 12 + x (2x - 5)
h (x) = - 12 + 2x² - 5x
h (x) = 2x² - 5x - 12
f (x) = h (x)
bonne soirée .
1 votes
Thanks 1
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Verified answer
Bonsoir,c)
f (x) = (2x + 3) (x - 4)
f (x) = 2x² - 8x + 3x - 12
f (x) = 2x² - 5x - 12
d)
f (3) = (2x + 3) (x - 4)
f (3) = (2 * 3 + 3) (3 - 4)
f (3) = (6 + 3) (- 1)
f (3) = 9 * (- 1)
f (3) = - 9
f (- 2) = (2x + 3) (x - 4)
f (- 2) = (2 * (- 2) + 3) (- 2 - 4)
f (- 2) = (- 2 + 3) (- 6)
f (- 2) = 1 * (- 6)
f (- 2) = - 6
e)
g (x) = 2x (2x - 5) - 3 (8 - x)
g (x) = 4x² - 10x - 24 + 3x
g (x) = 4x² - 7x - 24
f (x) ≠ g (x)
h (x) = - 12 + x (2x - 5)
h (x) = - 12 + 2x² - 5x
h (x) = 2x² - 5x - 12
f (x) = h (x)
1)
f (x) = (2x + 3) (x - 4)
f (x) = 2x² - 8x + 3x - 12
f (x) = 2x² - 5x - 12
2)
f (3) = (2x + 3) (x - 4)
f (3) = (2 * 3 + 3) (3 - 4)
f (3) = (6 + 3) (- 1)
f (3) = 9 * (- 1)
f (3) = - 9
3/
f (- 2) = (2x + 3) (x - 4)
f (- 2) = (2 * (- 2) + 3) (- 2 - 4)
f (- 2) = (- 2 + 3) (- 6)
f (- 2) = 1 * (- 6)
f (- 2) = - 6
4/
g (x) = 2x (2x - 5) - 3 (8 - x)
g (x) = 4x² - 10x - 24 + 3x
g (x) = 4x² - 7x - 24
f (x) ≠ g (x)
h (x) = - 12 + x (2x - 5)
h (x) = - 12 + 2x² - 5x
h (x) = 2x² - 5x - 12
f (x) = h (x)
bonne soirée .