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Math Help - urgent n imp

  1. #1
    Junior Member
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    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
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  2. #2
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    Quote Originally Posted by vungaralas View Post
    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.
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  3. #3
    Grand Panjandrum
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    Quote Originally Posted by vungaralas View Post
    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
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  4. #4
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    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
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