Bonjour
Développer et réduire les expressions suivantes.
A = 5(x – 8)
A = 5x - 40
B = (2x + 1)(x – 3)
B = 2x² - 6x + x - 3
B = 2x² - 5x - 3
C = 3+ (3x + 1)(5x - 5)
C = 3 + 15x² - 15x + 5x - 5
C = 15x² - 10x - 2
D = 5x – 2(x + 1)
D = 5x - 2x - 2
D = 3x - 2.
Bonjour,
A = 5(x – 8)
= 5x-40
B = (2x + 1)(x – 3)
= 2x² -6x +x -3
= 2x² -5x -3
C = 3+ (3x + 1)(5x - 5)
= 3+ 15x² -15x +5x -5
= 15x² -10x -2
D = 5x – 2(x + 1)
= 5x-2x -2
= 3x-2