Bonjour,
Factoriser:
A = 27 x² – 27 x + 27
A= 27(x²-x+1)
B= 9x(x – 3) + 9x(10+2x)
B= 9x(x-3+10+2x)
B= 9x(3x+7)
C = (2x + 1)(8 + x) – (3x - 1)(2x + 1)
C= (2x+1)(8+x-3x+1)
C= (2x+1)(-2x+9)
C= - (2x+1)(2x-9)
D= (11x – 3)² + (11x – 3)(5 +9x)
D= (11x-3)(11x-3+5+9x)
D= (11x-3)(20x+2)
D= 2(11x-3)(10x+1)