If x, y and z are three different numbers, then prove that: 2 + y2 + z -xy - yz - zx is always positive
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If x, y and z are three different numbers, then prove that: 2 + y2 + z -xy - yz - zx is always positive
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Answer:
Yes this numbers:2+y2 + z - xy - yz is always positive
Yes this number are positive 2+y²+z-xy-yz-zx