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Simplifying 2l2 + -1l + 28 = 0 Reorder the terms: 28 + -1l + 2l2 = 0 Solving 28 + -1l + 2l2 = 0 Solving for variable 'l'. Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. 14 + -0.5l + l2 = 0 Move the constant term to the right: Add '-14' to each side of the equation. 14 + -0.5l + -14 + l2 = 0 + -14 Reorder the terms: 14 + -14 + -0.5l + l2 = 0 + -14 Combine like terms: 14 + -14 = 0 0 + -0.5l + l2 = 0 + -14 -0.5l + l2 = 0 + -14 Combine like terms: 0 + -14 = -14 -0.5l + l2 = -14 The l term is -0.5l. Take half its coefficient (-0.25). Square it (0.0625) and add it to both sides. Add '0.0625' to each side of the equation. -0.5l + 0.0625 + l2 = -14 + 0.0625 Reorder the terms: 0.0625 + -0.5l + l2 = -14 + 0.0625 Combine like terms: -14 + 0.0625 = -13.9375 0.0625 + -0.5l + l2 = -13.9375 Factor a perfect square on the left side: (l + -0.25)(l + -0.25) = -13.9375 Can't calculate square root of the right side. The solution to this equation could not be determined.
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