bjr
A = -3x * 2 - 3x * (-x) = -6x + 3x²
B = 5x * (-7) + 5x * (-2x) = -35x - 10x²
C = -5 * (-7) - 5 * (-2x) = 35 + 10x
D = -x * (-3x) - x * 4 = +3x² - 4x
E = 8x * 7 + 8x * (-6x) = 56x - 48x² erreur d'énoncé je suppose
F = -8 * 3x - 8 * (-4) = -24x + 32
G = 9x * (-2x) + 9x * 3 à toi de réduire
Bonjour,
A = -3x(2 - x)
A = -3x × 2 - 3x × (-x)
A=-6x+3x²
B = 5x(-7 - 2x)
B = 5x × (-7) + 5x × (-2x)
B=-35x-10x²
C = -5(-7-2x)
C = -5 × (-7) - 5 × (-2x)
C = 35 + 10x
D= -X(-3x + 4)
D= -x × (-3x) - x × 4
D=3x²- 4x
E= 8x + (7 - 6x)E = 8x + ( 7 - 6x )
E= 8x - 6x + 7
E=8x+7-6x
E=2x+7
F = -8(3x – 4)
F = -8 × 3x - 8 × (-4)
F= -24x+32
G = 9x(-2x + 3)
G = 9x × (-2x) + 9x × 3
G=-18x²+27x