Pouvez vous me factoriser A= 4a+12b B=16xau carré - 16x+4 C= (3x+5) (5x-9) - (4-7x) (3x+5) D= 81xau carré+ 90x +25 E= (7x-1) au carré- 9x au carré

A= 4a+12b =4(a+3b)

B=16xau carré - 16x+4 = (4x-2)²

C= (3x+5) (5x-9) - (4-7x) (3x+5) =(3x+5)(5x-4+7x) =(3x+5)(12x-4)

 D= 81xau carré+ 90x +25 =(9x+5)²

 E= (7x-1) au carré- 9x au carré =(7x-1-3x)(7x-1+3x) =(4x-1)(10x-1)