Respuesta :

choixongdong
1. 
-1a^2b / 2 = 5a^4b/ - 10a^2

2.
3a/b^2 = 3a^4 / 1a^3 b^2

3.
-1/2b = -4a / 8ab

4.
3b^2/1a^2 = -9b^3 / -3a^2b