1. ## urgent n imp

If a,b,c,x,y,z are real quantities and (a+b+c)^2 =3(bc+ca+ab)-3(x^2+y^2+z^2),then
a=b=c
a+b+c=0
x=y=z=0
none

2. Originally Posted by vungaralas
If a,b,c,x,y,z are real quantities and (a+b+c)^2 =3(bc+ca+ab)-3(x^2+y^2+z^2),then
a=b=c
a+b+c=0
x=y=z=0
none
Where are you getting these? No one of these is sufficient but it is correct if a= b= c and x= y= z= 0.

3. Originally Posted by vungaralas
If a,b,c,x,y,z are real quantities and (a+b+c)^2 =3(bc+ca+ab)-3(x^2+y^2+z^2),then
a=b=c
a+b+c=0
x=y=z=0
none
Vague, is that how its worded in the original?

CB

4. If a,b,c,x,y,z are real quantities and (a+b+c)^2 =3(bc+ca+ab)-3(x^2+y^2+z^2),then
1.a=b=c
2.a+b+c=0
3.x=y=z=0
4.none