bonjour
ex 1
on remplace x par -4/3
e)
E(x) = E = (4x + 3) (3x - 1)
E(-4/3) = [4(-4/3) + 3][3(-4/3) - 1) =
= (-16/3) + 3)(-4 - 1]
= (-16/3 + 3) (- 5)
= (-16/3 + 9/3)(-5)
= (-7/3)(-5)
= 35/3
F(x) = 4 (3x - 1) (1 - x)
F(-4/3) = 4[3(-4/3) - 1][1 - (-4/3)]
= 4(-4 - 1)(3/3 + 4/3)
=4(-5)(7/3)
= -140/3
G(x) = E(x) + F(x)
G(-4/3) = E(-4/3) + F(-4/3)
= 35/3 - 140/3 = -105/3 = -35
→ G = (3x - 1) (5x + 8) erreur
G = 7(3x - 1)
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bonjour
ex 1
on remplace x par -4/3
e)
E(x) = E = (4x + 3) (3x - 1)
E(-4/3) = [4(-4/3) + 3][3(-4/3) - 1) =
= (-16/3) + 3)(-4 - 1]
= (-16/3 + 3) (- 5)
= (-16/3 + 9/3)(-5)
= (-7/3)(-5)
= 35/3
F(x) = 4 (3x - 1) (1 - x)
F(-4/3) = 4[3(-4/3) - 1][1 - (-4/3)]
= 4(-4 - 1)(3/3 + 4/3)
=4(-5)(7/3)
= -140/3
G(x) = E(x) + F(x)
G(-4/3) = E(-4/3) + F(-4/3)
= 35/3 - 140/3 = -105/3 = -35
→ G = (3x - 1) (5x + 8) erreur
G = 7(3x - 1)