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Simplifying 4c2 + c + -7 = 0 Reorder the terms: -7 + c + 4c2 = 0 Solving -7 + c + 4c2 = 0 Solving for variable 'c'. Begin completing the square. Divide all terms by 4 the coefficient of the squared term: Divide each side by '4'. -1.75 + 0.25c + c2 = 0 Move the constant term to the right: Add '1.75' to each side of the equation. -1.75 + 0.25c + 1.75 + c2 = 0 + 1.75 Reorder the terms: -1.75 + 1.75 + 0.25c + c2 = 0 + 1.75 Combine like terms: -1.75 + 1.75 = 0.00 0.00 + 0.25c + c2 = 0 + 1.75 0.25c + c2 = 0 + 1.75 Combine like terms: 0 + 1.75 = 1.75 0.25c + c2 = 1.75 The c term is c. Take half its coefficient (0.5). Square it (0.25) and add it to both sides. Add '0.25' to each side of the equation. 0.25c + 0.25 + c2 = 1.75 + 0.25 Reorder the terms: 0.25 + 0.25c + c2 = 1.75 + 0.25 Combine like terms: 1.75 + 0.25 = 2 0.25 + 0.25c + c2 = 2 Factor a perfect square on the left side: (c + 0.5)(c + 0.5) = 2 Calculate the square root of the right side: 1.414213562 Break this problem into two subproblems by setting (c + 0.5) equal to 1.414213562 and -1.414213562.Subproblem 1
c + 0.5 = 1.414213562 Simplifying c + 0.5 = 1.414213562 Reorder the terms: 0.5 + c = 1.414213562 Solving 0.5 + c = 1.414213562 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + c = 1.414213562 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + c = 1.414213562 + -0.5 c = 1.414213562 + -0.5 Combine like terms: 1.414213562 + -0.5 = 0.914213562 c = 0.914213562 Simplifying c = 0.914213562Subproblem 2
c + 0.5 = -1.414213562 Simplifying c + 0.5 = -1.414213562 Reorder the terms: 0.5 + c = -1.414213562 Solving 0.5 + c = -1.414213562 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + c = -1.414213562 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + c = -1.414213562 + -0.5 c = -1.414213562 + -0.5 Combine like terms: -1.414213562 + -0.5 = -1.914213562 c = -1.914213562 Simplifying c = -1.914213562Solution
The solution to the problem is based on the solutions from the subproblems. c = {0.914213562, -1.914213562}
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