Exercice : Développer puis réduire :
A = -3x(2-x)
B = 5x(-7- 2x)
C = -5(-7- 2x)
D = -x(-3x + 4)
E = 8x + (7 - 6x)
F = -8(3x - 4)
G = 9x(-2x + 3)
H = 2x - (-4x + 7)
A = -3x(2-x)
B = 5x(-7- 2x)
C = -5(-7- 2x)
D = -x(-3x + 4)
E = 8x + (7 - 6x)
F = -8(3x - 4)
G = 9x(-2x + 3)
H = 2x - (-4x + 7)
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Explications étape par étape:
A = -6x +3x²
B= -35x - 10x²
C = 35x + 10x²
D = 3x² -4x
E = 8x +7 -6x = 2x +7
F = -24x + 32
G = -18x² -27x
H = 2x +4x -7 = 6x -7
_et_=. +
_et+=. _
+et-=. _