Bonjour,
Matière : Mathématiques
Niveau : Collège
Thème abordé : developper et réduire des équations
A = (2x + 5)(-3x - 1) - 5(2 - x)
A = -6x^2 - 2x - 15x - 5 - 10 + 5x
A = -6x^2 - 12x - 15
B = 2(-3x + 5) + (-3x + 7)(2x - 9)
B = -6x + 10 - 6x^2 + 27x + 14x - 63
B = -6x^2 + 35x - 53
C = 2t(3 -4t) - (5 - a) + (9t + 2)(3t - 3)
C = 6t - 8t^2 - 5 + a + 27t^2 - 27t + 6t - 6
C = 19t^2 - 15t - 11 + a
D = -(5 - 2z)(z - 8)
D = -(5z - 40 - 2z^2 + 16z)
D = 2z^2 - 21z + 40
E = -2s(2 - s) + (-s - 2)(s + 5)
E = -4s + 2s^2 - s^2 - 5s - 2s - 10
E = s^2 - 11s - 10
F = (5x + 8)(-3x - 7) + (9x - 4)(-10 + 2x)
F = -15x^2 - 35x - 24x - 56 - 90x + 18x + 40 - 8x
F = -15x^2 - 139x - 16
G = (3x - 5)(-2x + 1) - (5x - 1)(3 - 4x)
G = -6x^2 + 3x + 10x - 5 - (15x - 20x^2 - 3 + 4x)
G = 20x^2 - 6x^2 + 13x - 19x - 5 + 3
G = 14x^2 - 6x - 2
