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Kiinder
@Kiinder
April 2019
1
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Bonsoir à tous :) J'ai déjà fait cet exercice mais vu que j'ai des difficultés pour les expressions littérales, j'aimerais bien avoir la correction :
E = ( -3x + 2) (2x + 3)
F = (2x - 3) ( -4x - 5)
G = (x + 3) (x + 4)
H = (x - 3) (x - 4)
Merci ^^
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kisimoha
Bonsoir,
E= (-3x+2)(3x+3)
E= (-3x*3x) + (-3x*3) +(2*3x) + (2*3) ( le symbole * c'est fois)
E = -9x²
-9x
+
6x
+6
donc E = -9x²
-3x
+6.
F= (2x-3)(-4x-5)
F = (2x*-4x) + (2x*-5) + (-3*-4x) + (-3*-5)
F= -8x²
-10x +12x
+15
F= -8x² +
2x
+15.
G= (x+3)(x+4)
G= x² +
4x +3x
+12
G= x² +
7x
+12.
H= (x-3)(x-4)
H= x²
-4x -3x
+12
H= x²
-7x
+12.
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E= (-3x+2)(3x+3)
E= (-3x*3x) + (-3x*3) +(2*3x) + (2*3) ( le symbole * c'est fois)
E = -9x² -9x +6x +6
donc E = -9x² -3x +6.
F= (2x-3)(-4x-5)
F = (2x*-4x) + (2x*-5) + (-3*-4x) + (-3*-5)
F= -8x² -10x +12x +15
F= -8x² +2x +15.
G= (x+3)(x+4)
G= x² +4x +3x +12
G= x² +7x +12.
H= (x-3)(x-4)
H= x² -4x -3x +12
H= x² -7x +12.