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Simplifying 2c2 + -11c + -5 = 0 Reorder the terms: -5 + -11c + 2c2 = 0 Solving -5 + -11c + 2c2 = 0 Solving for variable 'c'. Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. -2.5 + -5.5c + c2 = 0 Move the constant term to the right: Add '2.5' to each side of the equation. -2.5 + -5.5c + 2.5 + c2 = 0 + 2.5 Reorder the terms: -2.5 + 2.5 + -5.5c + c2 = 0 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + -5.5c + c2 = 0 + 2.5 -5.5c + c2 = 0 + 2.5 Combine like terms: 0 + 2.5 = 2.5 -5.5c + c2 = 2.5 The c term is -5.5c. Take half its coefficient (-2.75). Square it (7.5625) and add it to both sides. Add '7.5625' to each side of the equation. -5.5c + 7.5625 + c2 = 2.5 + 7.5625 Reorder the terms: 7.5625 + -5.5c + c2 = 2.5 + 7.5625 Combine like terms: 2.5 + 7.5625 = 10.0625 7.5625 + -5.5c + c2 = 10.0625 Factor a perfect square on the left side: (c + -2.75)(c + -2.75) = 10.0625 Calculate the square root of the right side: 3.172144385 Break this problem into two subproblems by setting (c + -2.75) equal to 3.172144385 and -3.172144385.Subproblem 1
c + -2.75 = 3.172144385 Simplifying c + -2.75 = 3.172144385 Reorder the terms: -2.75 + c = 3.172144385 Solving -2.75 + c = 3.172144385 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '2.75' to each side of the equation. -2.75 + 2.75 + c = 3.172144385 + 2.75 Combine like terms: -2.75 + 2.75 = 0.00 0.00 + c = 3.172144385 + 2.75 c = 3.172144385 + 2.75 Combine like terms: 3.172144385 + 2.75 = 5.922144385 c = 5.922144385 Simplifying c = 5.922144385Subproblem 2
c + -2.75 = -3.172144385 Simplifying c + -2.75 = -3.172144385 Reorder the terms: -2.75 + c = -3.172144385 Solving -2.75 + c = -3.172144385 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '2.75' to each side of the equation. -2.75 + 2.75 + c = -3.172144385 + 2.75 Combine like terms: -2.75 + 2.75 = 0.00 0.00 + c = -3.172144385 + 2.75 c = -3.172144385 + 2.75 Combine like terms: -3.172144385 + 2.75 = -0.422144385 c = -0.422144385 Simplifying c = -0.422144385Solution
The solution to the problem is based on the solutions from the subproblems. c = {5.922144385, -0.422144385}
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