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Simplifying 2x2 + 10x + -311 = 0 Reorder the terms: -311 + 10x + 2x2 = 0 Solving -311 + 10x + 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'. -155.5 + 5x + x2 = 0 Move the constant term to the right: Add '155.5' to each side of the equation. -155.5 + 5x + 155.5 + x2 = 0 + 155.5 Reorder the terms: -155.5 + 155.5 + 5x + x2 = 0 + 155.5 Combine like terms: -155.5 + 155.5 = 0.0 0.0 + 5x + x2 = 0 + 155.5 5x + x2 = 0 + 155.5 Combine like terms: 0 + 155.5 = 155.5 5x + x2 = 155.5 The x term is 5x. Take half its coefficient (2.5). Square it (6.25) and add it to both sides. Add '6.25' to each side of the equation. 5x + 6.25 + x2 = 155.5 + 6.25 Reorder the terms: 6.25 + 5x + x2 = 155.5 + 6.25 Combine like terms: 155.5 + 6.25 = 161.75 6.25 + 5x + x2 = 161.75 Factor a perfect square on the left side: (x + 2.5)(x + 2.5) = 161.75 Calculate the square root of the right side: 12.718097342 Break this problem into two subproblems by setting (x + 2.5) equal to 12.718097342 and -12.718097342.Subproblem 1
x + 2.5 = 12.718097342 Simplifying x + 2.5 = 12.718097342 Reorder the terms: 2.5 + x = 12.718097342 Solving 2.5 + x = 12.718097342 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + x = 12.718097342 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = 12.718097342 + -2.5 x = 12.718097342 + -2.5 Combine like terms: 12.718097342 + -2.5 = 10.218097342 x = 10.218097342 Simplifying x = 10.218097342Subproblem 2
x + 2.5 = -12.718097342 Simplifying x + 2.5 = -12.718097342 Reorder the terms: 2.5 + x = -12.718097342 Solving 2.5 + x = -12.718097342 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + x = -12.718097342 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = -12.718097342 + -2.5 x = -12.718097342 + -2.5 Combine like terms: -12.718097342 + -2.5 = -15.218097342 x = -15.218097342 Simplifying x = -15.218097342Solution
The solution to the problem is based on the solutions from the subproblems. x = {10.218097342, -15.218097342}
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