Sagot :
Bonjour,
Développer puis réduire:
A = 4(x + 4) + 6
A = 4x + 16 + 6
A = 4x + 24
E = 2c(-2c - 1)
E = -4c² - 2c
B = 7(3a - 1)
B = 21a - 7
F = -3 + 5x(x - 5)
F = -3 + 5x² - 25x
F = 5x² - 25x - 3
C = -9(8 - 2x + y)
C = -72 + 18x - 9y
C = 18x - 9y - 72
G = 3x(-x² + 2x + y)
G = -3x² + 6x² + 3xy
D = 6 + 5(9 - x)
D = 6 + 45 - 5x
D = -5x + 51
H = x(x - 2) + 6(-4 + x)
H = x² - 2x + (-24) + 6x
H = x² + 4x - 24
Bonne journée.