Réponses

2013-02-06T23:13:08+01:00

1. E = 9x²-25+(3x-5)(2x+15) = 15x²+35x-100

2. 9x²-25 = (3x-5) (3x+5)

3. E = 5(x+4)(3x-5)

2013-02-06T23:30:28+01:00