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Simplifying 5c2 + -2c + -8 = 0 Reorder the terms: -8 + -2c + 5c2 = 0 Solving -8 + -2c + 5c2 = 0 Solving for variable 'c'. Begin completing the square. Divide all terms by 5 the coefficient of the squared term: Divide each side by '5'. -1.6 + -0.4c + c2 = 0 Move the constant term to the right: Add '1.6' to each side of the equation. -1.6 + -0.4c + 1.6 + c2 = 0 + 1.6 Reorder the terms: -1.6 + 1.6 + -0.4c + c2 = 0 + 1.6 Combine like terms: -1.6 + 1.6 = 0.0 0.0 + -0.4c + c2 = 0 + 1.6 -0.4c + c2 = 0 + 1.6 Combine like terms: 0 + 1.6 = 1.6 -0.4c + c2 = 1.6 The c term is -0.4c. Take half its coefficient (-0.2). Square it (0.04) and add it to both sides. Add '0.04' to each side of the equation. -0.4c + 0.04 + c2 = 1.6 + 0.04 Reorder the terms: 0.04 + -0.4c + c2 = 1.6 + 0.04 Combine like terms: 1.6 + 0.04 = 1.64 0.04 + -0.4c + c2 = 1.64 Factor a perfect square on the left side: (c + -0.2)(c + -0.2) = 1.64 Calculate the square root of the right side: 1.280624847 Break this problem into two subproblems by setting (c + -0.2) equal to 1.280624847 and -1.280624847.Subproblem 1
c + -0.2 = 1.280624847 Simplifying c + -0.2 = 1.280624847 Reorder the terms: -0.2 + c = 1.280624847 Solving -0.2 + c = 1.280624847 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '0.2' to each side of the equation. -0.2 + 0.2 + c = 1.280624847 + 0.2 Combine like terms: -0.2 + 0.2 = 0.0 0.0 + c = 1.280624847 + 0.2 c = 1.280624847 + 0.2 Combine like terms: 1.280624847 + 0.2 = 1.480624847 c = 1.480624847 Simplifying c = 1.480624847Subproblem 2
c + -0.2 = -1.280624847 Simplifying c + -0.2 = -1.280624847 Reorder the terms: -0.2 + c = -1.280624847 Solving -0.2 + c = -1.280624847 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '0.2' to each side of the equation. -0.2 + 0.2 + c = -1.280624847 + 0.2 Combine like terms: -0.2 + 0.2 = 0.0 0.0 + c = -1.280624847 + 0.2 c = -1.280624847 + 0.2 Combine like terms: -1.280624847 + 0.2 = -1.080624847 c = -1.080624847 Simplifying c = -1.080624847Solution
The solution to the problem is based on the solutions from the subproblems. c = {1.480624847, -1.080624847}
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