Bonjour vous pouvez m'aider en math je suis en 4e c'est sur les expressions il faut les détailler : A = 5x (4x + 4) B = (5z + 7) x (-3x) C = 4z (-3x - 10) D = (
Question
A = 5x (4x + 4)
B = (5z + 7) x (-3x)
C = 4z (-3x - 10)
D = (3x - 7) x (-7z)
E = 3 (-6z - 8)
F = (9x - 5) x 4x
G = 9 (8z - 9)
H = 8 (9z - 8)
I = (-10 - 4) x (-3z)
J = 4x (-2x - 6)
K = (2x - 100) x (-4x)
L = 5x (-x + 4)
M = (-2x + 2) x x (Le dernier truc c'est fois x sur la M)
N = (-2x + 8) x 7
O = (2x + 2) x 3
1 Réponse
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1. Réponse Svant
Réponse :
A = 5x (4x + 4)
A = 5x×4x + 5x×4
A = 20x² + 20x
B = (5z + 7) x (-3x)
B = -3x×5z + (-3x)×7
B = -15xz - 21x
C = 4z (-3x - 10)
C = 4z×(-3x) + 4z×(-10)
C = -12xz - 40z
D = (3x - 7) x (-7z)
D = -7z×3x - 7z×(-7)
D = -21xz + 49z
E = 3 (-6z - 8)
E = 3×(-6z) + 3×(-8)
E = -18z - 24
F = (9x - 5) x 4x
F = 4x×9x + 4x×(-5)
F = 36x² - 20x
G = 9 (8z - 9)
G = 9×8z + 9×(-9)
G = 72z - 81
H = 8 (9z - 8)
H = 8×9z + 8×(-8)
H = 72z - 64
I = (-10 - 4) x (-3z)
I = -14 × (-3z)
I = 42z
J = 4x (-2x - 6)
J = 4x×(-2x) + 4x×(-6)
J = -8x² - 24x
K = (2x - 100) x (-4x)
K = -4x×2x - 4x×(-100)
K = -8x² + 400x
L = 5x (-x + 4)
L = 5x×(-x) + 5x×4
L = -5x² + 20x
M = (-2x + 2) × x
M = x×(-2x) + x×2
M = -2x² + 2x
N = (-2x + 8) x 7
N = 7×(-2x) + 7×8
N = -14x + 56
O = (2x + 2) x 3
O = 3×2x + 3×2
O = 6x + 6