D=(3x-5)²-(2x-1)(3x-5)
=(3x-5)(3x-5-2x+1)
=(3x-5)(x-4)
=3x²-12x-5x+20
D=3x²-17x+20
Pour x=5/3
D=(3x-5)(x-4)
=(3*(5/3)-5)((5/3)-4)
=(5-5)((5/3)-4)
=0*((5/3)-4)
D=0
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D=(3x-5)²-(2x-1)(3x-5)
=(3x-5)(3x-5-2x+1)
=(3x-5)(x-4)
=3x²-12x-5x+20
D=3x²-17x+20
Pour x=5/3
D=(3x-5)(x-4)
=(3*(5/3)-5)((5/3)-4)
=(5-5)((5/3)-4)
=0*((5/3)-4)
D=0
(3x-5)(-2x+1+3x-5)
(3x-5)(x-4)
(3*5/3 -5)(5/3 -4)
(15/3 -5)(5/3 -12/3)
(15/3 - 15/3 )( -7/3)
(0)(-7/3)
et je suis pas sur