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Simplifying r2 + 18xy + 81y2 = 0 Solving r2 + 18xy + 81y2 = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-18xy' to each side of the equation. r2 + 18xy + -18xy + 81y2 = 0 + -18xy Combine like terms: 18xy + -18xy = 0 r2 + 0 + 81y2 = 0 + -18xy r2 + 81y2 = 0 + -18xy Remove the zero: r2 + 81y2 = -18xy Add '-81y2' to each side of the equation. r2 + 81y2 + -81y2 = -18xy + -81y2 Combine like terms: 81y2 + -81y2 = 0 r2 + 0 = -18xy + -81y2 r2 = -18xy + -81y2 Simplifying r2 = -18xy + -81y2 Reorder the terms: r2 + 18xy + 81y2 = -18xy + 18xy + -81y2 + 81y2 Combine like terms: -18xy + 18xy = 0 r2 + 18xy + 81y2 = 0 + -81y2 + 81y2 r2 + 18xy + 81y2 = -81y2 + 81y2 Combine like terms: -81y2 + 81y2 = 0 r2 + 18xy + 81y2 = 0 The solution to this equation could not be determined.
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