Suppression des parenthèses
E = x² + (6x + 4)
E =
F = x² - (6x + 4)
F =
G = x² - (-6x - 4)
B = 7x² - 3x² + (4x – 4) + x
B =
C = -(2x² + 1) + (3 + 2x²)
C =
D = -7 - x² + 1/3x - (4 - 2/3x)
D =
Calculs importants !
(2x)² =
3a × 7 =
(5x) × (4x)