Réponse:
Bonjour,
Q = 5 - 5(x + 2) + x - 9
Q = 5 - 5x - 10 + x - 9
Q = -5x + x + 5 - 10 - 9
Q = -4x - 14
R = x(2x + 5) - 3x(1 - 3x)
R = 2x² +5x - 3x + 9
R = 2x² + 2x + 9
S = 4x(2x - 1) - (5x - 2) - 4
S = 6x² - 4x - 5x + 2 - 4
S = 6x² - 9x - 2
T = x(3x + 5) - 2(2x - 6)
T = 3x² + 5x - 4x + 12
T = 3x² + x + 12
U = x - 5(x + 5) - 3 - 4(4x - 5)
U = x - 5x - 25 - 3 - 16x + 20
U = x - 5x - 16x - 25 - 3 + 20
U = - 20x - 8
Voilà bonne continuation !!!
