Réponse :
Explications étape par étape
Bonsoir
Developper :
F = (x - 5)^2
F = x^2 - 2 * x * 5 + (-5)^2
F = x^2 - 10x + 25
G = (-3x - 1)(5 + 4x)
G = -3x * 5 - 3x * 4x - 1 * 5 - 1 * 4x
G = -15x - 12x^2 - 5 - 4x
G = -12x^2 - 19x - 5
H = (2x + 1)^2 + (5x - 2)^2
H = (2x)^2 + 2 * 2x * 1 + (5x)^2 - 2 * 5x * 2 + (-2)^2
H = 4x^2 + 4x + 1 + 25x^2 - 20x + 4
H = 29x^2 - 16x + 5
I = (9x + 2)(4 - 2x)
I = 9x * 4 - 9x * 2x + 2 * 4 - 2 * 2x
I = 36x - 18x^2 + 8 - 4x
I = -18x^2 + 32x + 8
J = (-3 - 5x)^2
J = (-3)^2 - 2 * 3 * (-5x) + (-5x)^2
J = 9 + 30x + 25x^2
