Bonsoir,
A = 5 x + 5
A = 5 x + 5 * 1
A = 5(x + 1)
B= 3x - 6x²
B = 3x * 1 - 3x * 2x
B = 3x(1 - 2x)
C= 3 x +2x(3x + 2)
C = 3x + 6x² + 4x
C = 7x + 6x²
C = 7x + 6x * x
C = x(7 + 6x)
D= (x + 9) (x + 6) + x + 9
D = (x + 9)(x + 6) + (x + 9)
D = (x + 9)(x + 6) + 1*(x+ 9)
D = (x + 9)[(x + 6) + 1]
D = (x + 9)(x + 7)
E = (2x - 5)² +2x - 5
E = (2x - 5)(2x - 5) + 1*(2x - 5)
E = (2x - 5)[(2x - 5) + 1]
E = (2x - 5)(2x - 4)