QAZER117
Answered

On considere l'expresion A(x)=(4-x)(2x-3)+9-4x² Verifier que 9-4x²=(3-2x)(3+2x)

Sagot :

9 - 4x² = 9 +6x -6x- 4x²

 

            = 9 - 4x²

LEALAROUILLE
9-4x^2 = 9+6x-6x-4x^2
9-4x^2 = 9-4^2
Je comfirme ;p