Question

if a,b,c are the roots of eqn x(cube)-px(square)+qc+r then (a-b)(b+c)(c+a)

Answer 1

If a,b,c are the sides of a triangle ABC such that x2−2(a+b+c)x+3λ(ab+bc+ca)=0x2−2(a+b+c)x+3λ(ab+bc+ca)=0 has real roots then to what interval does λλ belong to ?