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Simplifying 9n2 + 79 = 18n Reorder the terms: 79 + 9n2 = 18n Solving 79 + 9n2 = 18n Solving for variable 'n'. Reorder the terms: 79 + -18n + 9n2 = 18n + -18n Combine like terms: 18n + -18n = 0 79 + -18n + 9n2 = 0 Begin completing the square. Divide all terms by 9 the coefficient of the squared term: Divide each side by '9'. 8.777777778 + -2n + n2 = 0 Move the constant term to the right: Add '-8.777777778' to each side of the equation. 8.777777778 + -2n + -8.777777778 + n2 = 0 + -8.777777778 Reorder the terms: 8.777777778 + -8.777777778 + -2n + n2 = 0 + -8.777777778 Combine like terms: 8.777777778 + -8.777777778 = 0.000000000 0.000000000 + -2n + n2 = 0 + -8.777777778 -2n + n2 = 0 + -8.777777778 Combine like terms: 0 + -8.777777778 = -8.777777778 -2n + n2 = -8.777777778 The n term is -2n. Take half its coefficient (-1). Square it (1) and add it to both sides. Add '1' to each side of the equation. -2n + 1 + n2 = -8.777777778 + 1 Reorder the terms: 1 + -2n + n2 = -8.777777778 + 1 Combine like terms: -8.777777778 + 1 = -7.777777778 1 + -2n + n2 = -7.777777778 Factor a perfect square on the left side: (n + -1)(n + -1) = -7.777777778 Can't calculate square root of the right side. The solution to this equation could not be determined.
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