Exercice 75 :
A = 5x + 3(5x + 3)
A = 5x + 15x + 9
A = 20x + 9
B = 4x² + (3x + 4)²
B = 4x² + 9x² + 24x + 16
B = 13x² + 24x + 16
C = 6x² - (3x + 2)²
C = 6x² - 9x² - 12x - 4
C = -3x² - 12x - 4
D = 2x - (3x + 4)(4x + 3)
D = 3x - 12x² - 9x - 16x - 12
D = -12x² -22x - 12
Exercice 76 :
E = 4x² + (x + 5)²
E = 4x² + x² + 10x + 25
E = 5x² + 10x + 25
F = -8x - (2x - 2)²
F = -8x - 4x² + 8x - 4
F = -4x² - 4
G = 5x + 4(5x + 4)
G = 5x + 20x + 16
G = 25x + 16
H = 10x² - (4x + 3)(4x - 3)
H = 10x² - 16x² + 9
H = -6x² + 9