Bonjour
factoriser :
À = x^2 + 2x + 1
A = a^2 + 2 * a * b + b^2
A = (a + b)^2
A = (x + 1)^2
B = 9 - 16x^2
B = 3^2 - (4x)^2
B = a^2 - b^2
B = (a - b)(a + b)
B = (3 - 4x)(3 + 4x)
C = 4(x^2 - 25) + 7(x + 5)
C = 4(x^2 - 5^2) + 7(x + 5)
C = 4(x - 5)(x + 5) + 7(x + 5)
C = (x + 5)[4(x - 5) + 7]
c = (x + 5)(4x - 20 + 7)
C = (x + 5)(4x - 13)
D = (3x - 5)^2 - (x + 2)^2
D = a^2 - b^2
D = (3x - 5 - x - 2)(3x - 5 + x + 2)
D = (2x - 7)(4x - 3)
