Réponses

2014-01-19T23:15:19+01:00
7x (3-2x)-3 (4x-3)= 21x-14x²-12x+9 = -14x²+9x+9
2014-01-19T23:16:08+01:00
D=7x (3-2x)-3 (4x-3)
d=21x-14x²-12x+9
d=-14x²+9x+9