Prove that `x^2+y^2+z^2-x y-y z-z x` is always positive.
1,208 views · Published 13 October 2018 · 2:25 · Indexed 1 October 2026
Channel: Doubtnut · 2018 · Education
To ask Unlimited Maths doubts download Doubtnut from - https://goo.gl/9WZjCW Prove that `x^2+y^2+z^2-x y-y z-z x` is always positive.
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