Hi,
(25ab-15b) :(-5b) = (5b(5a-3))/(-5b) = -5a+3
(-32mn+24m) :(-4m) = (4m(-8n+6))/(-4m) = 8n-6
(-45xy-36y) :9y = (9y(-5x-4) = -5x-4
(-49cd-63d) : (-7d) = (-7d(7c+9))/(-7d) = 7c+9
(18r + 48rs) : (-6r) = (6r(3+8s))/(-6r) = -3-8s
(13p-15qp) : (-p) = (p(13-15q))/(-p) = -13+15q
Grüße