Question

x2+2y2+ 3z2-2xyz, 5x2-2y2-z2+ 7xyz​

Answer 1

Answer:

$( {x}^{2} + {2y}^{2} + {3z}^{2} - 2xyz) + ( {5x}^{2} - {2y}^{2} - {z}^{2} + 7xyz) \\ \\ ( {x}^{2} + {5x}^{2} ) + ( {2y}^{2} - {2y}^{2} ) + ( {3z}^{2} - {z}^{2} ) + ( - 2xyz + 7xyz) \\ \\ ( {6x}^{2} ) + (0) + ( {2z}^{2} ) + (5xyz) \\ \\ {6x}^{2} + {2z}^{2} + 5xyz \: \\ \\ the \: answer \: is \: {6x}^{2} + {2z}^{2} + 5xyz$

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