Question

a. [(b+c)×(a+b+c)]=0 prove

Answer 1

Step-by-step explanation:

1. b(a+b+c)+C(a+b+c)=0
2. ab+b.b+bc+ac+bc+c.c =0
3. ab+ac+2bc+b.b+c.c=o
4. a(b+c)+(b+c)×(b+c)=0
5. hence proved that
6. a(b+c)+(b+c)×(b+c) not equal to o