Bonjour,
RAPPEL: (a+b)²=a²+2ab+b² (a+b)(c+d)=ac+ad+bc+bd
On a A=(2x+1)²-(x+1)(4x+1)
=(2x)²+2*2x*1+1²-(4x*x+x*1+4x*1+1*1)
=4x²+4x+1-(4x²+x+4x+1)
=4x²+4x+1-4x²-x-4x-1
=4x²-4x²+4x-4x+1-1-x
= -x
Copyright © 2024 ELIBRARY.TIPS - All rights reserved.
Lista de comentários
Bonjour,
RAPPEL: (a+b)²=a²+2ab+b² (a+b)(c+d)=ac+ad+bc+bd
On a A=(2x+1)²-(x+1)(4x+1)
=(2x)²+2*2x*1+1²-(4x*x+x*1+4x*1+1*1)
=4x²+4x+1-(4x²+x+4x+1)
=4x²+4x+1-4x²-x-4x-1
=4x²-4x²+4x-4x+1-1-x
= -x