Factoriser les expressions suivantes:
D=(2x-3)(5x-7)-(2x-3)²
D= (2x-3)[(5x-7)-(2x-3)]
D= (2x-3)(5x-7-2x+3)
D= (2x-3)(3x-4)
E=(x+4)(3x+4)-x-4
E= (x+4)(3x+4)+(x+4)
E= (x+4)[3x+4 +1)
E= (x+4)(3x+5)
F=(3x+7)(2x+1)+(x-4)(-2x-1)
F= (3x+7)(2x+1)- (x-4)(2x+1)
F= (2x+1)[(3x+7)-(x-4)]
E= (2x+1)(3x+7-x-4)
E= (2x+1)(2x+3)