Bonjour,
2 Développer les expressions suivantes :
A = (x - 10)²= x²-10x-10x+100= x²-20x+100
B = (8x - 7)(8x + 7)= 64x²-56x+56x-49= 64x²-49
C = (4 + 2x)(4 - 2x)= 16+8x-8x-4x²= 16-4x²
D = (11 - 3x)²= 121-33x-33x+9x²= 9x²-66x+121
E = (- 6x - 1)²= 36x²+6x+6x+1= 36x²+12x+1
F = (x + 12)(12 - x)= 12x+144-x²-12x= 144-x²