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Simplifying 9x2 + 69x + 142 = 0 Reorder the terms: 142 + 69x + 9x2 = 0 Solving 142 + 69x + 9x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 9 the coefficient of the squared term: Divide each side by '9'. 15.77777778 + 7.666666667x + x2 = 0 Move the constant term to the right: Add '-15.77777778' to each side of the equation. 15.77777778 + 7.666666667x + -15.77777778 + x2 = 0 + -15.77777778 Reorder the terms: 15.77777778 + -15.77777778 + 7.666666667x + x2 = 0 + -15.77777778 Combine like terms: 15.77777778 + -15.77777778 = 0.00000000 0.00000000 + 7.666666667x + x2 = 0 + -15.77777778 7.666666667x + x2 = 0 + -15.77777778 Combine like terms: 0 + -15.77777778 = -15.77777778 7.666666667x + x2 = -15.77777778 The x term is 7.666666667x. Take half its coefficient (3.833333334). Square it (14.69444445) and add it to both sides. Add '14.69444445' to each side of the equation. 7.666666667x + 14.69444445 + x2 = -15.77777778 + 14.69444445 Reorder the terms: 14.69444445 + 7.666666667x + x2 = -15.77777778 + 14.69444445 Combine like terms: -15.77777778 + 14.69444445 = -1.08333333 14.69444445 + 7.666666667x + x2 = -1.08333333 Factor a perfect square on the left side: (x + 3.833333334)(x + 3.833333334) = -1.08333333 Can't calculate square root of the right side. The solution to this equation could not be determined.
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