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Sorenzakz
@Sorenzakz
May 2019
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Bonsooir les gens,
J'aurais besoin d'aide pour cette exercice de MATHS svp c'est urgent.
Merci beaucoup à ceux qui m'aideront j'ferais de meme !!
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aymanemaysae
Bonsoir ;
A = (9 - x)(9 - x)
= (9 - x)²
= 81 - 18x +x²
B = 2(5x - 4)(5x + 4)
= 2(25x² - 16)
= 50x² - 32
C = (1 + 6x)²
= 1 + 12x + 36x²
D = (3x + 2)² - 5(8x - 7)
= 9x² + 12x + 4 - 40x + 35
= 9x² - 28x + 39
E = (x - 1)(x + 1)(2 - 5x)
= (x² - 1)(2 - 5x)
= 2x² - 5x^3 - 2 + 5x
= -5x^3 + 2x² + 5x - 2
F = (1/5 x - 5/2)²
= 1/25 x² - 2 * 1/5 x * 5/2 + 25/4
= 1/25 x² - x + 25/4
G = (4/3 x - 9/10)(4/3 x + 9/10)
= 16/9 x² - 81/100
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Thanks 1
sorenzakz
Merciii
sorenzakz
Bcpp
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A = (9 - x)(9 - x)
= (9 - x)²
= 81 - 18x +x²
B = 2(5x - 4)(5x + 4)
= 2(25x² - 16)
= 50x² - 32
C = (1 + 6x)²
= 1 + 12x + 36x²
D = (3x + 2)² - 5(8x - 7)
= 9x² + 12x + 4 - 40x + 35
= 9x² - 28x + 39
E = (x - 1)(x + 1)(2 - 5x)
= (x² - 1)(2 - 5x)
= 2x² - 5x^3 - 2 + 5x
= -5x^3 + 2x² + 5x - 2
F = (1/5 x - 5/2)²
= 1/25 x² - 2 * 1/5 x * 5/2 + 25/4
= 1/25 x² - x + 25/4
G = (4/3 x - 9/10)(4/3 x + 9/10)
= 16/9 x² - 81/100