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Simplifying c2 + 16c + 64 = 15 Reorder the terms: 64 + 16c + c2 = 15 Solving 64 + 16c + c2 = 15 Solving for variable 'c'. Reorder the terms: 64 + -15 + 16c + c2 = 15 + -15 Combine like terms: 64 + -15 = 49 49 + 16c + c2 = 15 + -15 Combine like terms: 15 + -15 = 0 49 + 16c + c2 = 0 Begin completing the square. Move the constant term to the right: Add '-49' to each side of the equation. 49 + 16c + -49 + c2 = 0 + -49 Reorder the terms: 49 + -49 + 16c + c2 = 0 + -49 Combine like terms: 49 + -49 = 0 0 + 16c + c2 = 0 + -49 16c + c2 = 0 + -49 Combine like terms: 0 + -49 = -49 16c + c2 = -49 The c term is 16c. Take half its coefficient (8). Square it (64) and add it to both sides. Add '64' to each side of the equation. 16c + 64 + c2 = -49 + 64 Reorder the terms: 64 + 16c + c2 = -49 + 64 Combine like terms: -49 + 64 = 15 64 + 16c + c2 = 15 Factor a perfect square on the left side: (c + 8)(c + 8) = 15 Calculate the square root of the right side: 3.872983346 Break this problem into two subproblems by setting (c + 8) equal to 3.872983346 and -3.872983346.Subproblem 1
c + 8 = 3.872983346 Simplifying c + 8 = 3.872983346 Reorder the terms: 8 + c = 3.872983346 Solving 8 + c = 3.872983346 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + c = 3.872983346 + -8 Combine like terms: 8 + -8 = 0 0 + c = 3.872983346 + -8 c = 3.872983346 + -8 Combine like terms: 3.872983346 + -8 = -4.127016654 c = -4.127016654 Simplifying c = -4.127016654Subproblem 2
c + 8 = -3.872983346 Simplifying c + 8 = -3.872983346 Reorder the terms: 8 + c = -3.872983346 Solving 8 + c = -3.872983346 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + c = -3.872983346 + -8 Combine like terms: 8 + -8 = 0 0 + c = -3.872983346 + -8 c = -3.872983346 + -8 Combine like terms: -3.872983346 + -8 = -11.872983346 c = -11.872983346 Simplifying c = -11.872983346Solution
The solution to the problem is based on the solutions from the subproblems. c = {-4.127016654, -11.872983346}
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