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Simplifying z = x2 + -2xy + 3y2 Reorder the terms: z = -2xy + x2 + 3y2 Solving z = -2xy + x2 + 3y2 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Simplifying z = -2xy + x2 + 3y2
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