Réponses

2013-01-28T19:15:50+01:00

1. (4x-3)² = 16x² - 24x + 9

2. F(x) = 16x² - 24x + 9 + 9x² +27x - 3x -9 = 25x² = (5x)²

3. 25x² = 125 => x² = 5 donc x = rac(5) ou -rac(5)