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Simplifying 2c2 + 9c + 6 = 0 Reorder the terms: 6 + 9c + 2c2 = 0 Solving 6 + 9c + 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'. 3 + 4.5c + c2 = 0 Move the constant term to the right: Add '-3' to each side of the equation. 3 + 4.5c + -3 + c2 = 0 + -3 Reorder the terms: 3 + -3 + 4.5c + c2 = 0 + -3 Combine like terms: 3 + -3 = 0 0 + 4.5c + c2 = 0 + -3 4.5c + c2 = 0 + -3 Combine like terms: 0 + -3 = -3 4.5c + c2 = -3 The c term is 4.5c. Take half its coefficient (2.25). Square it (5.0625) and add it to both sides. Add '5.0625' to each side of the equation. 4.5c + 5.0625 + c2 = -3 + 5.0625 Reorder the terms: 5.0625 + 4.5c + c2 = -3 + 5.0625 Combine like terms: -3 + 5.0625 = 2.0625 5.0625 + 4.5c + c2 = 2.0625 Factor a perfect square on the left side: (c + 2.25)(c + 2.25) = 2.0625 Calculate the square root of the right side: 1.436140662 Break this problem into two subproblems by setting (c + 2.25) equal to 1.436140662 and -1.436140662.Subproblem 1
c + 2.25 = 1.436140662 Simplifying c + 2.25 = 1.436140662 Reorder the terms: 2.25 + c = 1.436140662 Solving 2.25 + c = 1.436140662 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-2.25' to each side of the equation. 2.25 + -2.25 + c = 1.436140662 + -2.25 Combine like terms: 2.25 + -2.25 = 0.00 0.00 + c = 1.436140662 + -2.25 c = 1.436140662 + -2.25 Combine like terms: 1.436140662 + -2.25 = -0.813859338 c = -0.813859338 Simplifying c = -0.813859338Subproblem 2
c + 2.25 = -1.436140662 Simplifying c + 2.25 = -1.436140662 Reorder the terms: 2.25 + c = -1.436140662 Solving 2.25 + c = -1.436140662 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-2.25' to each side of the equation. 2.25 + -2.25 + c = -1.436140662 + -2.25 Combine like terms: 2.25 + -2.25 = 0.00 0.00 + c = -1.436140662 + -2.25 c = -1.436140662 + -2.25 Combine like terms: -1.436140662 + -2.25 = -3.686140662 c = -3.686140662 Simplifying c = -3.686140662Solution
The solution to the problem is based on the solutions from the subproblems. c = {-0.813859338, -3.686140662}
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