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Simplifying 2x2 + -3x + -216 = 0 Reorder the terms: -216 + -3x + 2x2 = 0 Solving -216 + -3x + 2x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. -108 + -1.5x + x2 = 0 Move the constant term to the right: Add '108' to each side of the equation. -108 + -1.5x + 108 + x2 = 0 + 108 Reorder the terms: -108 + 108 + -1.5x + x2 = 0 + 108 Combine like terms: -108 + 108 = 0 0 + -1.5x + x2 = 0 + 108 -1.5x + x2 = 0 + 108 Combine like terms: 0 + 108 = 108 -1.5x + x2 = 108 The x term is -1.5x. Take half its coefficient (-0.75). Square it (0.5625) and add it to both sides. Add '0.5625' to each side of the equation. -1.5x + 0.5625 + x2 = 108 + 0.5625 Reorder the terms: 0.5625 + -1.5x + x2 = 108 + 0.5625 Combine like terms: 108 + 0.5625 = 108.5625 0.5625 + -1.5x + x2 = 108.5625 Factor a perfect square on the left side: (x + -0.75)(x + -0.75) = 108.5625 Calculate the square root of the right side: 10.419332992 Break this problem into two subproblems by setting (x + -0.75) equal to 10.419332992 and -10.419332992.Subproblem 1
x + -0.75 = 10.419332992 Simplifying x + -0.75 = 10.419332992 Reorder the terms: -0.75 + x = 10.419332992 Solving -0.75 + x = 10.419332992 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.75' to each side of the equation. -0.75 + 0.75 + x = 10.419332992 + 0.75 Combine like terms: -0.75 + 0.75 = 0.00 0.00 + x = 10.419332992 + 0.75 x = 10.419332992 + 0.75 Combine like terms: 10.419332992 + 0.75 = 11.169332992 x = 11.169332992 Simplifying x = 11.169332992Subproblem 2
x + -0.75 = -10.419332992 Simplifying x + -0.75 = -10.419332992 Reorder the terms: -0.75 + x = -10.419332992 Solving -0.75 + x = -10.419332992 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.75' to each side of the equation. -0.75 + 0.75 + x = -10.419332992 + 0.75 Combine like terms: -0.75 + 0.75 = 0.00 0.00 + x = -10.419332992 + 0.75 x = -10.419332992 + 0.75 Combine like terms: -10.419332992 + 0.75 = -9.669332992 x = -9.669332992 Simplifying x = -9.669332992Solution
The solution to the problem is based on the solutions from the subproblems. x = {11.169332992, -9.669332992}
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