Bonjour
Développer et réduire les expressions suivantes :
S = (x+1)² + (x - 3)²
S = x² + 2x + 1 + x² - 6x + 9
S = x² + x² + 2x - 6x + 1 + 9
S = 2x² - 4x + 10
T = (x - 2)² + (x + 4)(x-4)
T = x² - 4x + 4 + x² - 16
T = x² + x² - 4x + 4 - 16
T = 2x² - 4x - 12
U = (2x - 5) + ( 3x + 4) (3x – 4)
U = 2x + 5 + 9x² - 16
U = 9x² + 2x + 5 - 16
U = 9x² + 2x - 11
V= (x - 3)(x + 3) - (x + 1).
V = x² - 9 - x - 1
V = x² - x - 10
W = (5x - 2)(x + 3) - (2x + 5 )²
W = 5x² + 5x - 2x - 6 - (4x² - 20x + 25)
W = 5x² + 5x - 2x - 6 - x² + 20x - 25
W = 5x² - x² + 5x + 20x - 2x - 6 - 25
W = 4x² + 23x - 31
X = (x - 5)- 4(x + 3)²
X = x - 5 - 4 (x² + 6x + 9)
X = x - 5 - 4x² - 24x - 36
X = - 4x² - 23x - 41.
