Let a, b, c be the sides of a triangle, no two of them are equal and λ∈R. If the roots of the equation x2+2(a+b+c)x+3λ( ab + bc +ca ) = 0 are real, then

Let a, b, c be the sides of a triangle, no two of them are equal and

1.	Let a, b, c be the sides of a triangle, no two of them are equal and λ∈R. If the roots of the equation x2+2(a+b+c)x+3λ( ab + bc +ca ) = 0 are real, then
Answer» Let a, b, c be the sides of a triangle, no two of them are equal and $λ \in R$ . If the roots of the equation $x^{2} + 2 (a + b + c) x + 3 λ$ ( ab + bc +ca ) = 0 are real, then