Réponses

2014-01-19T22:44:55+01:00
Bonsoir,

B = 2x(-5x - 1) - x(5x + 3)
B = (-10x² - 2x) - (5x² + 3x)
B = -10x² - 2x - 5x² - 3x
b = -15x² - 5x

2014-01-19T23:07:42+01:00