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Simplifying 2n(9n + -1) + 7(n + 6) = -60 Reorder the terms: 2n(-1 + 9n) + 7(n + 6) = -60 (-1 * 2n + 9n * 2n) + 7(n + 6) = -60 (-2n + 18n2) + 7(n + 6) = -60 Reorder the terms: -2n + 18n2 + 7(6 + n) = -60 -2n + 18n2 + (6 * 7 + n * 7) = -60 -2n + 18n2 + (42 + 7n) = -60 Reorder the terms: 42 + -2n + 7n + 18n2 = -60 Combine like terms: -2n + 7n = 5n 42 + 5n + 18n2 = -60 Solving 42 + 5n + 18n2 = -60 Solving for variable 'n'. Reorder the terms: 42 + 60 + 5n + 18n2 = -60 + 60 Combine like terms: 42 + 60 = 102 102 + 5n + 18n2 = -60 + 60 Combine like terms: -60 + 60 = 0 102 + 5n + 18n2 = 0 Begin completing the square. Divide all terms by 18 the coefficient of the squared term: Divide each side by '18'. 5.666666667 + 0.2777777778n + n2 = 0 Move the constant term to the right: Add '-5.666666667' to each side of the equation. 5.666666667 + 0.2777777778n + -5.666666667 + n2 = 0 + -5.666666667 Reorder the terms: 5.666666667 + -5.666666667 + 0.2777777778n + n2 = 0 + -5.666666667 Combine like terms: 5.666666667 + -5.666666667 = 0.000000000 0.000000000 + 0.2777777778n + n2 = 0 + -5.666666667 0.2777777778n + n2 = 0 + -5.666666667 Combine like terms: 0 + -5.666666667 = -5.666666667 0.2777777778n + n2 = -5.666666667 The n term is 0.2777777778n. Take half its coefficient (0.1388888889). Square it (0.01929012346) and add it to both sides. Add '0.01929012346' to each side of the equation. 0.2777777778n + 0.01929012346 + n2 = -5.666666667 + 0.01929012346 Reorder the terms: 0.01929012346 + 0.2777777778n + n2 = -5.666666667 + 0.01929012346 Combine like terms: -5.666666667 + 0.01929012346 = -5.64737654354 0.01929012346 + 0.2777777778n + n2 = -5.64737654354 Factor a perfect square on the left side: (n + 0.1388888889)(n + 0.1388888889) = -5.64737654354 Can't calculate square root of the right side. The solution to this equation could not be determined.
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