Question

1. If a + b + c = 0 then (a + b)(b + c)(c + a) =?​

Answer 1

Explanation:

a+b+c=0

then

a+b= -c

b+c= -a

c+a= -b

so,

(a+b)(b+c)(c+a)

=(-c)×(-a)×(-b)

= -abc