Respuesta :

Firstly, you would look for what is common in 5b and -15c. What is common is 5. So 5 is outside the bracket. Then you see what times 5 will give you 5b (b) and what times 5 will give you -15c (-3c). So the answer is 5(b-3c).
Billymkhoi
5b -15c
= 5*(b -3c)

Final answer: 5(b-3c)~