Bonjour
Développer les expressions suivantes :
A =x × 2a -x × x + a × 2a - a × x
A = 2ax - x² + 2a² - ax
A = ax - x² + 2a²
B= -2x × (6 - x ) × ( 3 - x )
B = (- 12x + 2x²) * (3 - x)
B = - 36x + 12x² + 6x² - 2x²
B = 16x² - 36x
C= ( 2x - 1 ) × ( 3 - x ) - ( -2x + 4 ) - ( x2 - x )
C = 6x - 2x² - 3 + x + 2x - 4 - x² + x
C = - 2x² - x² + 6x + x + 2x + x - 3 - 4
C = - x² + 10x - 7.
