Réponse :
Explications étape par étape :
D = 5x- (2x - 3)
D = 5x - 2x + 3
D = 3x + 3
E = 4 + 6x(- 2x +7)
E = 4 - 12x² + 42x
E = -12x² + 42x + 4
F = 3x- 3(-x + 5)
F = 3x + 3x - 15
F = 6x - 15
G = -5x - (- 5x² +x - 1)
G = -5x + 5x² -x + 1
G = 5x² - 6x + 1
H = 3x+ 5x(4- 2x) - (x²-3x+ 5)
H= 3x + 20x - 10x² - x² + 3x - 5
H = -10x² + 26x - 5
i = 8 + 2x- 2x(3x- 4) + 5x(3 - x)
i = 8 + 2x - 6x² +8x + 15x - 5x²
i = -11x² + 25x + 8
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Réponse :
Explications étape par étape :
D = 5x- (2x - 3)
D = 5x - 2x + 3
D = 3x + 3
E = 4 + 6x(- 2x +7)
E = 4 - 12x² + 42x
E = -12x² + 42x + 4
F = 3x- 3(-x + 5)
F = 3x + 3x - 15
F = 6x - 15
G = -5x - (- 5x² +x - 1)
G = -5x + 5x² -x + 1
G = 5x² - 6x + 1
H = 3x+ 5x(4- 2x) - (x²-3x+ 5)
H= 3x + 20x - 10x² - x² + 3x - 5
H = -10x² + 26x - 5
i = 8 + 2x- 2x(3x- 4) + 5x(3 - x)
i = 8 + 2x - 6x² +8x + 15x - 5x²
i = -11x² + 25x + 8