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Simplifying 5c2 + -3c = 7 Reorder the terms: -3c + 5c2 = 7 Solving -3c + 5c2 = 7 Solving for variable 'c'. Reorder the terms: -7 + -3c + 5c2 = 7 + -7 Combine like terms: 7 + -7 = 0 -7 + -3c + 5c2 = 0 Begin completing the square. Divide all terms by 5 the coefficient of the squared term: Divide each side by '5'. -1.4 + -0.6c + c2 = 0 Move the constant term to the right: Add '1.4' to each side of the equation. -1.4 + -0.6c + 1.4 + c2 = 0 + 1.4 Reorder the terms: -1.4 + 1.4 + -0.6c + c2 = 0 + 1.4 Combine like terms: -1.4 + 1.4 = 0.0 0.0 + -0.6c + c2 = 0 + 1.4 -0.6c + c2 = 0 + 1.4 Combine like terms: 0 + 1.4 = 1.4 -0.6c + c2 = 1.4 The c term is -0.6c. Take half its coefficient (-0.3). Square it (0.09) and add it to both sides. Add '0.09' to each side of the equation. -0.6c + 0.09 + c2 = 1.4 + 0.09 Reorder the terms: 0.09 + -0.6c + c2 = 1.4 + 0.09 Combine like terms: 1.4 + 0.09 = 1.49 0.09 + -0.6c + c2 = 1.49 Factor a perfect square on the left side: (c + -0.3)(c + -0.3) = 1.49 Calculate the square root of the right side: 1.220655562 Break this problem into two subproblems by setting (c + -0.3) equal to 1.220655562 and -1.220655562.Subproblem 1
c + -0.3 = 1.220655562 Simplifying c + -0.3 = 1.220655562 Reorder the terms: -0.3 + c = 1.220655562 Solving -0.3 + c = 1.220655562 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '0.3' to each side of the equation. -0.3 + 0.3 + c = 1.220655562 + 0.3 Combine like terms: -0.3 + 0.3 = 0.0 0.0 + c = 1.220655562 + 0.3 c = 1.220655562 + 0.3 Combine like terms: 1.220655562 + 0.3 = 1.520655562 c = 1.520655562 Simplifying c = 1.520655562Subproblem 2
c + -0.3 = -1.220655562 Simplifying c + -0.3 = -1.220655562 Reorder the terms: -0.3 + c = -1.220655562 Solving -0.3 + c = -1.220655562 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '0.3' to each side of the equation. -0.3 + 0.3 + c = -1.220655562 + 0.3 Combine like terms: -0.3 + 0.3 = 0.0 0.0 + c = -1.220655562 + 0.3 c = -1.220655562 + 0.3 Combine like terms: -1.220655562 + 0.3 = -0.920655562 c = -0.920655562 Simplifying c = -0.920655562Solution
The solution to the problem is based on the solutions from the subproblems. c = {1.520655562, -0.920655562}
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