Réponses

2012-05-13T21:22:17+02:00

A = (2x+5)(2x-7)

A = 4x²-14x+10x-35

A = 4x²-4x-35

 

B = (2x-1)²-36

B = 4x²-4x+1-36

B = 4x²-4x-35

 

C = ((1/3) -3x)((3/2)x -5)

C = (3/6)x -(5/3) - (9/2)x² + 15x

C = -(9/2)x² +(31/2)x -(5/3)

 

D=-4 (3x+5)-(3x-5)+4x+3

D=-12x-20-3x+5+4x+3

D=-11x-12

 

Pour x = -2.5

A = 4(-2.5)²-4(-2.5)-35

A = 25 + 10 - 35

A = 0

 

FIN