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Simplifying -98a2 + 21a + -54 = 0 Reorder the terms: -54 + 21a + -98a2 = 0 Solving -54 + 21a + -98a2 = 0 Solving for variable 'a'. Begin completing the square. Divide all terms by -98 the coefficient of the squared term: Divide each side by '-98'. 0.5510204082 + -0.2142857143a + a2 = 0 Move the constant term to the right: Add '-0.5510204082' to each side of the equation. 0.5510204082 + -0.2142857143a + -0.5510204082 + a2 = 0 + -0.5510204082 Reorder the terms: 0.5510204082 + -0.5510204082 + -0.2142857143a + a2 = 0 + -0.5510204082 Combine like terms: 0.5510204082 + -0.5510204082 = 0.0000000000 0.0000000000 + -0.2142857143a + a2 = 0 + -0.5510204082 -0.2142857143a + a2 = 0 + -0.5510204082 Combine like terms: 0 + -0.5510204082 = -0.5510204082 -0.2142857143a + a2 = -0.5510204082 The a term is -0.2142857143a. Take half its coefficient (-0.1071428572). Square it (0.01147959185) and add it to both sides. Add '0.01147959185' to each side of the equation. -0.2142857143a + 0.01147959185 + a2 = -0.5510204082 + 0.01147959185 Reorder the terms: 0.01147959185 + -0.2142857143a + a2 = -0.5510204082 + 0.01147959185 Combine like terms: -0.5510204082 + 0.01147959185 = -0.53954081635 0.01147959185 + -0.2142857143a + a2 = -0.53954081635 Factor a perfect square on the left side: (a + -0.1071428572)(a + -0.1071428572) = -0.53954081635 Can't calculate square root of the right side. The solution to this equation could not be determined.
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