15ab - [(6ab - c) + (4ab + c)] =?
15ab - [(6ab - c) + (4ab + c)] =.
41palma
15ab - [(6ab - c) + (4ab + c)] =.
En resumen
= 15ab - [(6ab - c + 4ab + c)] = 15ab - [(10ab)] = 15ab - 10ab = 5ab.
Lily08
= 15ab - [(6ab - c + 4ab + c)] = 15ab - [(10ab)] = 15ab - 10ab = 5ab.
GAMER7779
15ab - (6ab - c) + (4ab + c)
15ab (6ab - c + 4ab + c)
15ab (6ab + 4ab)
15ab - 10ab
5ab.