Question

15.a(b -c) + b(c – a) + c(a – b) is equal to *

a)ab + bc + ca

b)0

c)2(ab + bc + ca)

no spam.. ​

Answer 1

= a(b -c) + b(c – a) + c(a – b)

= ab - ac + bc - ab + ac - bc

= ab - ab - ac + ac + bc - bc (all will get cancelled)

= 0

All will get cancelled because sign are opposite .

Answer 2

Answer:

Correct answer is:-

option (b) 0✔️

see the above attachment it's help you....