Bonsoir,
M = (x + 5)²
M = x² + 2 × x × 5 + 5²
M = x² + 10x + 25
N = (4 + 7x)²
N = 4² + 2 × 4 × 7x + (7x)²
N = 16 + 56x + 49x²
P = (4x + 6)²
P = (4x)² + 2 × 4x × 6 + 6²
P = 16x² + 48x + 36
S = (x - 5)²
S = x² - 2 × x × 5 + 5²
S = x² - 10x + 25
T = (3x - 7)²
T = (3x)² - 2 × 3x × 7 + 7²
T = 9x² - 42x + 49
U = (1 - 6x)²
U = 1² - 2 × 1 × 6x + (6x)²
U = 1 - 12x + 36x²
C = (y + 3)(y - 3)
C = y² - 3²
C = y² - 9
D = (2x + 5)(2x - 5)
D = (2x)² - 5²
D = 4x² - 25
E = (3 + 4x)(4x - 3)
E = (4x + 3)(4x - 3)
E = (4x)² - 3²
E= 16x² - 9
F = (7 - 4x)(4x + 7)
F = (7 - 4x)(7 + 4x)
F = 7² - (4x)²
F = 49 - 16x²
