If a→,b→,c→ any three non-coplanar vectors, then the equation [b→×c→c→×a→a→×b→]x2+[a→+b→b→+c→c→+a→]x+1+[b→−c→c→−a→a→−b→]=0 has roots
real and distinct
real
equal
imaginary
The given equation reduces to[a→b→c→]2x2+2[a→b→c→]x+1=0⇒D=0