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plage972
@plage972
January 2021
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bonsoir j'aurais besoin d'aide pour du calcul littéral
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PAU64
Verified answer
G = (a + b) (a - b)
G = a² - b²
H = (x + 6)²
H = x² + 2 * x * 6 + 6²
H = x² + 12x + 36
I = (x - 2) (x + 7) + x²
I = x * x + x * 7 - 2 * x - 2 * 7 + x²
I = x² + 7x - 2x - 14 + x²
I = 2x² + 5x - 14
J = 2x² + (x - 4) (3 - x)
J = 2x² + x * 3 + x * (- x) - 4 * 3 - 4 * (- x)
J = 2x² + 3x - x² - 12 + 4x
J = x² + 7x - 12
1 votes
Thanks 1
PAU64
* désigne "fois"
plage972
ok merci
PAU64
de rien ;)
jojo23
G= a²-b²
H= (x+6)² = x²+12x+36
I= (x-2)(x+7)+x² = x² + 7x - 2x - 14 +x² = 2x² + 5x -14
J= 2x² + (x-4)(3-x) = 2x² +3x -x² -12 + 4x = x² + 7x -12
1 votes
Thanks 1
plage972
merci
plage972
tu as fait développer réduire et ordonner
jojo23
oui
plage972
ok merci
jojo23
de rien ;)
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Verified answer
G = (a + b) (a - b)G = a² - b²
H = (x + 6)²
H = x² + 2 * x * 6 + 6²
H = x² + 12x + 36
I = (x - 2) (x + 7) + x²
I = x * x + x * 7 - 2 * x - 2 * 7 + x²
I = x² + 7x - 2x - 14 + x²
I = 2x² + 5x - 14
J = 2x² + (x - 4) (3 - x)
J = 2x² + x * 3 + x * (- x) - 4 * 3 - 4 * (- x)
J = 2x² + 3x - x² - 12 + 4x
J = x² + 7x - 12
H= (x+6)² = x²+12x+36
I= (x-2)(x+7)+x² = x² + 7x - 2x - 14 +x² = 2x² + 5x -14
J= 2x² + (x-4)(3-x) = 2x² +3x -x² -12 + 4x = x² + 7x -12