Réponse :
Bonjour
Explications étape par étape
A = (x +2)(x -3) + (x -3)
A = x² -3x +2x -6 + x -3
A = x² -9
B = ( 2x -3)²
B = 4x² -12x +9
A pour x = 3
A = (x +2)(x -3) + (x -3)
A = (3 + 2)( 3-3) + ( 3-3)
A = (5)(0) + 0
A = 0
A pour x = 0
A = (x +2)(x -3) + (x -3)
A = (0 +2)(0 -3) + (0 -3)
A = (2) (-3) +-3
A = -6 -3 = -9
B pour x = 1,5
B = ( 2x -3)²
B = (2 X 1,5 -3)²
B = (3 -3)² = 0
B pour x = 0
B = ( 2x -3)²
B = (2 X 0 -3)²
B = (0 -3)²
B -3² = 9
