Find the minimum value of $2x^2 + 2y^2 + 5z^2 - 2xy - 4yz - 4x - 2z + 15$ over all real numbers $x,$ $y,$ $z.$
Question:
Find the minimum value of $2x^2 + 2y^2 + 5z^2 - 2xy - 4yz - 4x - 2z + 15$ over all real numbers $x,$ $y,$ $z.$
Answer:
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Find the minimum value of $2x^2 + 2y^2 + 5z^2 - 2xy - 4yz - 4x - 2z + 15$ over all real numbers $x,$ $y,$ $z.$
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