Répondre :
cc
a) 45x - 90x² = 45x * 1 + 45x * (-2x) = 45x (1 - 2x)
b) 36a3 + 18ab - 60a²
6a * 6a² + 6a * 3b + 6a * (-10a) = 6a (6a² + 3b - 10a)
et
c) 25xy - 50x² + 100x = 25x * y + 25x * (-2x) + 25x * 4
= 25x (y - 2x + 4)
cc
a) 45x - 90x² = 45x * 1 + 45x * (-2x) = 45x (1 - 2x)
b) 36a3 + 18ab - 60a²
6a * 6a² + 6a * 3b + 6a * (-10a) = 6a (6a² + 3b - 10a)
et
c) 25xy - 50x² + 100x = 25x * y + 25x * (-2x) + 25x * 4
= 25x (y - 2x + 4)