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Simplifying 2c(c + -3) = 7 Reorder the terms: 2c(-3 + c) = 7 (-3 * 2c + c * 2c) = 7 (-6c + 2c2) = 7 Solving -6c + 2c2 = 7 Solving for variable 'c'. Reorder the terms: -7 + -6c + 2c2 = 7 + -7 Combine like terms: 7 + -7 = 0 -7 + -6c + 2c2 = 0 Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. -3.5 + -3c + c2 = 0 Move the constant term to the right: Add '3.5' to each side of the equation. -3.5 + -3c + 3.5 + c2 = 0 + 3.5 Reorder the terms: -3.5 + 3.5 + -3c + c2 = 0 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + -3c + c2 = 0 + 3.5 -3c + c2 = 0 + 3.5 Combine like terms: 0 + 3.5 = 3.5 -3c + c2 = 3.5 The c term is -3c. Take half its coefficient (-1.5). Square it (2.25) and add it to both sides. Add '2.25' to each side of the equation. -3c + 2.25 + c2 = 3.5 + 2.25 Reorder the terms: 2.25 + -3c + c2 = 3.5 + 2.25 Combine like terms: 3.5 + 2.25 = 5.75 2.25 + -3c + c2 = 5.75 Factor a perfect square on the left side: (c + -1.5)(c + -1.5) = 5.75 Calculate the square root of the right side: 2.397915762 Break this problem into two subproblems by setting (c + -1.5) equal to 2.397915762 and -2.397915762.Subproblem 1
c + -1.5 = 2.397915762 Simplifying c + -1.5 = 2.397915762 Reorder the terms: -1.5 + c = 2.397915762 Solving -1.5 + c = 2.397915762 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + c = 2.397915762 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + c = 2.397915762 + 1.5 c = 2.397915762 + 1.5 Combine like terms: 2.397915762 + 1.5 = 3.897915762 c = 3.897915762 Simplifying c = 3.897915762Subproblem 2
c + -1.5 = -2.397915762 Simplifying c + -1.5 = -2.397915762 Reorder the terms: -1.5 + c = -2.397915762 Solving -1.5 + c = -2.397915762 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + c = -2.397915762 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + c = -2.397915762 + 1.5 c = -2.397915762 + 1.5 Combine like terms: -2.397915762 + 1.5 = -0.897915762 c = -0.897915762 Simplifying c = -0.897915762Solution
The solution to the problem is based on the solutions from the subproblems. c = {3.897915762, -0.897915762}
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