Réponses

2013-11-02T01:03:27+01:00
B = x² +x -1
D = 2x -3x²-6+9x
D = -3x²+11x-6

b) 5/(x-1) = -3/4
=> 5 = (-3(x-1))/4
=> 20 = -3(x-1)
=> 20 = -3x+3
=>17 = -3x
=> x = -17/3