Question: (a) Show that x3 - (a2 + b2 + c2)x - 2 abc has real roots by considering A. (b) Show that a2 + b2

(a) Show that x3 - (a2 + b2 + c2)x - 2 abc has real roots by considering A.
(b) Show that a2 + b2 + c2 ‰¥ ab + ac + be by considering B.
Let
(a) Show that x3 - (a2 + b2 + c2)x

c a b b c 0 b c a

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