Bonjour
Développer et réduire les expressions suivantes :
A=( 5x+3)-(- 4x +9)
A = 5x + 3 + 4x - 9
A = 5x + 4x + 3 - 9
A = 9x - 6
B = 8 (-4x+6)- ( 23 – 2x )
B = - 32x + 48 - 23 + 2x
B = - 32x + 2x + 48 - 23
B = - 30x + 25
C=( 5x + 2)(4x – 3)
C = 20x² - 15x + 8x - 6
C = 20x² - 7x - 6
D= ( 2x – 12)(- 8x - 1)
D = - 16x² - 2x + 96x + 12
D = - 16x² + 94x + 12
E= 5 ( 2x – 3) - 45x
E = 10x - 15 - 45x
E = 10x - 45x - 15
E = - 35x - 15
F =(-4x+6) (2x - 3)-5(1 - 2x )
F = - 8x² + 12x + 12x - 18 - 5 + 10x
F = - 8x² + 12x + 12x + 10x - 18 - 5
F = - 8x² + 34x - 23
G=( 2x – 6 )²
G = 4x² - 24x + 36
H=( 7 - 8x) ( 7 + 8x )
H = 49 - 64x²
I =( 5 – 2x) (-4+ 3x ) - (4 + 2x ) (4 – 2x )
I = - 20 + 15x + 8x - 6x² - (16 - 4x²)
I = - 20 + 15x + 8x - 6x² - 16 + 4x²
I = - 6x² + 4x² + 15x + 8x - 20 - 16
I = - 2x² + 23x - 36.