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Simplifying 4.9x2 + -39x + 85 = 0 Reorder the terms: 85 + -39x + 4.9x2 = 0 Solving 85 + -39x + 4.9x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 4.9 the coefficient of the squared term: Divide each side by '4.9'. 17.34693878 + -7.959183673x + x2 = 0 Move the constant term to the right: Add '-17.34693878' to each side of the equation. 17.34693878 + -7.959183673x + -17.34693878 + x2 = 0 + -17.34693878 Reorder the terms: 17.34693878 + -17.34693878 + -7.959183673x + x2 = 0 + -17.34693878 Combine like terms: 17.34693878 + -17.34693878 = 0.00000000 0.00000000 + -7.959183673x + x2 = 0 + -17.34693878 -7.959183673x + x2 = 0 + -17.34693878 Combine like terms: 0 + -17.34693878 = -17.34693878 -7.959183673x + x2 = -17.34693878 The x term is -7.959183673x. Take half its coefficient (-3.979591837). Square it (15.83715119) and add it to both sides. Add '15.83715119' to each side of the equation. -7.959183673x + 15.83715119 + x2 = -17.34693878 + 15.83715119 Reorder the terms: 15.83715119 + -7.959183673x + x2 = -17.34693878 + 15.83715119 Combine like terms: -17.34693878 + 15.83715119 = -1.50978759 15.83715119 + -7.959183673x + x2 = -1.50978759 Factor a perfect square on the left side: (x + -3.979591837)(x + -3.979591837) = -1.50978759 Can't calculate square root of the right side. The solution to this equation could not be determined.
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