A = 6x - (5x + 4)
A = 6x - 5x - 4
A = x² - 4
A = x² + (-4)
B = (3x² - 4) - (3x - 2x²) - 15
B = 3x² - 4 - 3x + 2x² - 15
B = 5x² - 3x - 19
(ou autrement écris B = 5x² + (-3x) + (- 19)
C = 7(3x + 4) - 6
C = 21x + 28 - 6
C = 21x + 22
D = (x - 4)(2x - 5)
D = 2x² - 5x - 8x + 20
D = 2x² - 13x + 20
D = 2x² + (-13x) + 20
E = (3x - 4)²
E = 9x² - 24x + 16
E = 9x² +(-24x) + 16
F = (2x + 5)(3x - 1) + 5(x - 2)
F = 6x² - 2x + 15x - 5 + 5x - 10
F = 6x² + 18x - 15
F = 6x² + 18x + (-15)
G = (3x - 5)(2x + 1) - (5x - 1)(4x - 3)
G = 6x² + 3x - 10x - 5 - (20x² - 15x - 4x + 3)
G = 6x² - 7x - 5 - 20x² + 15x + 4x - 3
G = - 14x² + 12x - 8
G = - 14x² + 12x + (-8)
