Bonjour,
D= 7 - 5x - 11 + 2x E = 2y + y×5 - 3
D = -5x + 2x +7 - 11 E = 2y + 5y - 3
D = -3x -4 E = 7y -3
F = 2a - 5 + (-5+2a) G = (-3b + 7) - (2b - 11)
F = 2a - 5 + 2a - 5 G = -3b + 7 - 2b +11
F = 4a -10 G = -5b +18
Identités remarquables :
A = (7x - 2)²
A = 49x² - 28x +4
B = (9x - 8) (9x +8)
B = 81x² +72x - 72x - 64
B = 81x² -64
C = (x+6)² - 3x²
C = x² +12x +36 - 3x²
C = -2x² +12x +36
