Répondre :
1)
36-12X+X2-(3-4X)(6-X)
=36-12X+X2-(18-3X-24X+4X*X)
=36-12X+2X-18+3X+24X-4X*X
=36-18-17X+24X-4X*X
=18+7X-4X*X
X*X= X au carre
=
36-12X+X2-(3-4X)(6-X)
=36-12X+X2-(18-3X-24X+4X*X)
=36-12X+2X-18+3X+24X-4X*X
=36-18-17X+24X-4X*X
=18+7X-4X*X
X*X= X au carre
=