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Simplifying 7y2 + -1y + 9 = 0 Reorder the terms: 9 + -1y + 7y2 = 0 Solving 9 + -1y + 7y2 = 0 Solving for variable 'y'. Begin completing the square. Divide all terms by 7 the coefficient of the squared term: Divide each side by '7'. 1.285714286 + -0.1428571429y + y2 = 0 Move the constant term to the right: Add '-1.285714286' to each side of the equation. 1.285714286 + -0.1428571429y + -1.285714286 + y2 = 0 + -1.285714286 Reorder the terms: 1.285714286 + -1.285714286 + -0.1428571429y + y2 = 0 + -1.285714286 Combine like terms: 1.285714286 + -1.285714286 = 0.000000000 0.000000000 + -0.1428571429y + y2 = 0 + -1.285714286 -0.1428571429y + y2 = 0 + -1.285714286 Combine like terms: 0 + -1.285714286 = -1.285714286 -0.1428571429y + y2 = -1.285714286 The y term is -0.1428571429y. Take half its coefficient (-0.07142857145). Square it (0.005102040819) and add it to both sides. Add '0.005102040819' to each side of the equation. -0.1428571429y + 0.005102040819 + y2 = -1.285714286 + 0.005102040819 Reorder the terms: 0.005102040819 + -0.1428571429y + y2 = -1.285714286 + 0.005102040819 Combine like terms: -1.285714286 + 0.005102040819 = -1.280612245181 0.005102040819 + -0.1428571429y + y2 = -1.280612245181 Factor a perfect square on the left side: (y + -0.07142857145)(y + -0.07142857145) = -1.280612245181 Can't calculate square root of the right side. The solution to this equation could not be determined.
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