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Simplifying n2 + -18n + 693 = 0 Reorder the terms: 693 + -18n + n2 = 0 Solving 693 + -18n + n2 = 0 Solving for variable 'n'. Begin completing the square. Move the constant term to the right: Add '-693' to each side of the equation. 693 + -18n + -693 + n2 = 0 + -693 Reorder the terms: 693 + -693 + -18n + n2 = 0 + -693 Combine like terms: 693 + -693 = 0 0 + -18n + n2 = 0 + -693 -18n + n2 = 0 + -693 Combine like terms: 0 + -693 = -693 -18n + n2 = -693 The n term is -18n. Take half its coefficient (-9). Square it (81) and add it to both sides. Add '81' to each side of the equation. -18n + 81 + n2 = -693 + 81 Reorder the terms: 81 + -18n + n2 = -693 + 81 Combine like terms: -693 + 81 = -612 81 + -18n + n2 = -612 Factor a perfect square on the left side: (n + -9)(n + -9) = -612 Can't calculate square root of the right side. The solution to this equation could not be determined.
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