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Simplifying 7x2 + -100x + 645 = 0 Reorder the terms: 645 + -100x + 7x2 = 0 Solving 645 + -100x + 7x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 7 the coefficient of the squared term: Divide each side by '7'. 92.14285714 + -14.28571429x + x2 = 0 Move the constant term to the right: Add '-92.14285714' to each side of the equation. 92.14285714 + -14.28571429x + -92.14285714 + x2 = 0 + -92.14285714 Reorder the terms: 92.14285714 + -92.14285714 + -14.28571429x + x2 = 0 + -92.14285714 Combine like terms: 92.14285714 + -92.14285714 = 0.00000000 0.00000000 + -14.28571429x + x2 = 0 + -92.14285714 -14.28571429x + x2 = 0 + -92.14285714 Combine like terms: 0 + -92.14285714 = -92.14285714 -14.28571429x + x2 = -92.14285714 The x term is -14.28571429x. Take half its coefficient (-7.142857145). Square it (51.02040819) and add it to both sides. Add '51.02040819' to each side of the equation. -14.28571429x + 51.02040819 + x2 = -92.14285714 + 51.02040819 Reorder the terms: 51.02040819 + -14.28571429x + x2 = -92.14285714 + 51.02040819 Combine like terms: -92.14285714 + 51.02040819 = -41.12244895 51.02040819 + -14.28571429x + x2 = -41.12244895 Factor a perfect square on the left side: (x + -7.142857145)(x + -7.142857145) = -41.12244895 Can't calculate square root of the right side. The solution to this equation could not be determined.
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