Répondre :
A x=4(x-1)(x-1)-9
4(x²-x-x+1)-9 =4(x²-2x+1)-9 =(4x²-8x+4)-9 =4x²-8x-5
B x= 4x²+2x-10x-5 =4x²-8x-5
4(x²-x-x+1)-9 =4(x²-2x+1)-9 =(4x²-8x+4)-9 =4x²-8x-5
B x= 4x²+2x-10x-5 =4x²-8x-5