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Simplifying 4x2 + -27x + -162 = 0 Reorder the terms: -162 + -27x + 4x2 = 0 Solving -162 + -27x + 4x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 4 the coefficient of the squared term: Divide each side by '4'. -40.5 + -6.75x + x2 = 0 Move the constant term to the right: Add '40.5' to each side of the equation. -40.5 + -6.75x + 40.5 + x2 = 0 + 40.5 Reorder the terms: -40.5 + 40.5 + -6.75x + x2 = 0 + 40.5 Combine like terms: -40.5 + 40.5 = 0.0 0.0 + -6.75x + x2 = 0 + 40.5 -6.75x + x2 = 0 + 40.5 Combine like terms: 0 + 40.5 = 40.5 -6.75x + x2 = 40.5 The x term is -6.75x. Take half its coefficient (-3.375). Square it (11.390625) and add it to both sides. Add '11.390625' to each side of the equation. -6.75x + 11.390625 + x2 = 40.5 + 11.390625 Reorder the terms: 11.390625 + -6.75x + x2 = 40.5 + 11.390625 Combine like terms: 40.5 + 11.390625 = 51.890625 11.390625 + -6.75x + x2 = 51.890625 Factor a perfect square on the left side: (x + -3.375)(x + -3.375) = 51.890625 Calculate the square root of the right side: 7.203514767 Break this problem into two subproblems by setting (x + -3.375) equal to 7.203514767 and -7.203514767.Subproblem 1
x + -3.375 = 7.203514767 Simplifying x + -3.375 = 7.203514767 Reorder the terms: -3.375 + x = 7.203514767 Solving -3.375 + x = 7.203514767 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.375' to each side of the equation. -3.375 + 3.375 + x = 7.203514767 + 3.375 Combine like terms: -3.375 + 3.375 = 0.000 0.000 + x = 7.203514767 + 3.375 x = 7.203514767 + 3.375 Combine like terms: 7.203514767 + 3.375 = 10.578514767 x = 10.578514767 Simplifying x = 10.578514767Subproblem 2
x + -3.375 = -7.203514767 Simplifying x + -3.375 = -7.203514767 Reorder the terms: -3.375 + x = -7.203514767 Solving -3.375 + x = -7.203514767 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.375' to each side of the equation. -3.375 + 3.375 + x = -7.203514767 + 3.375 Combine like terms: -3.375 + 3.375 = 0.000 0.000 + x = -7.203514767 + 3.375 x = -7.203514767 + 3.375 Combine like terms: -7.203514767 + 3.375 = -3.828514767 x = -3.828514767 Simplifying x = -3.828514767Solution
The solution to the problem is based on the solutions from the subproblems. x = {10.578514767, -3.828514767}
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