Bonsoir tout le monde es ce que vous pouvez m'aider a faire l'exercices 1 et 2 svp :) merci

22)
a) (10 - x)² = 100 - 20x + x² = x² - 20x + 100
b) (x + 9) (x - 9) = x² - 9x + 9x - 81 = x² - 81
c) (10 + x)² = 100 + 20x + x² = x² + 20x + 100
d) (7 + 8x)² = 49 + 112x + 64x² = 64x² + 112x + 49

23)
a) (3 - 4x)² = 9 - 24x + 16x² = 16x² - 24x + 9
b) (10 + 9x) (10 - 9x) = 100 - 90x + 90x - 81x² = - 81x² + 100
c) (3y + 6)² = 9y² + 36y + 36
d) (8x - 6y) (8x + 6y) = 64x² + 48xy - 48xy - 36y² = - 36y² + 64x²

24)
a) (3 + 2x)² = 9 + 12x + 4x² = 4x² + 12x + 9
b) (3 + 2x) (3 - 2x) = 9 - 6x + 6x - 4x² = - 4x² + 9
c) (3 - 2x)² = 9 - 12x + 4x² = 4x² - 12x + 9
d) (2x - 3) (2x + 3) = 4x² + 6x - 6x - 9 = 4x² - 9

25)
A =  (x + 2)² + 9
A = x² + 4x + 4 + 9
A = x² + 4x + 13

B = (2x + 1)² - x + 3
B = 4x² + 4x + 1 - x + 3
B = 4x² + 3x + 4

C = (3x - 2)² - 5 (x + 3)
C = 9x² - 12x + 4 - 5x - 15
C = 9x² - 17x - 11

D = (x + 5)² + 3 (x + 6)
D = x² + 10x + 25 + 3x + 18
D = x² + 13x + 43