Bonjour
- 4/9 (1 + x) (1/2x + - 4/3) + (- 3/4x + 1) (- 8/3 + - 2/3x)
= - 4/9 (1/2x - 4/3 + 1/2x² - 4/3x) + 24/12x + 6/12x² - 8/3 - 2/3x
= - 8/18x + 16/27 - 4/18x² + 16/27x + 24/12x + 6/12x² - 8/3 - 2/3x
= - 4/18x² + 6/12x² - 8/18x - 2/3x + 16/27x + 24/12x + 16/27 - 8/3
= - 8/36x² + 18/36x² - 48/108x - 72/108x + 64/108x + 216/108x + 16/27 - 72/27
= 10/36x² + 160/108x - 56/27
= 5/18x² + 46/27x - 56/27.
