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Simplifying -2x2 + -20x + -46 = 0 Reorder the terms: -46 + -20x + -2x2 = 0 Solving -46 + -20x + -2x2 = 0 Solving for variable 'x'. Factor out the Greatest Common Factor (GCF), '-2'. -2(23 + 10x + x2) = 0 Ignore the factor -2.Subproblem 1
Set the factor '(23 + 10x + x2)' equal to zero and attempt to solve: Simplifying 23 + 10x + x2 = 0 Solving 23 + 10x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '-23' to each side of the equation. 23 + 10x + -23 + x2 = 0 + -23 Reorder the terms: 23 + -23 + 10x + x2 = 0 + -23 Combine like terms: 23 + -23 = 0 0 + 10x + x2 = 0 + -23 10x + x2 = 0 + -23 Combine like terms: 0 + -23 = -23 10x + x2 = -23 The x term is 10x. Take half its coefficient (5). Square it (25) and add it to both sides. Add '25' to each side of the equation. 10x + 25 + x2 = -23 + 25 Reorder the terms: 25 + 10x + x2 = -23 + 25 Combine like terms: -23 + 25 = 2 25 + 10x + x2 = 2 Factor a perfect square on the left side: (x + 5)(x + 5) = 2 Calculate the square root of the right side: 1.414213562 Break this problem into two subproblems by setting (x + 5) equal to 1.414213562 and -1.414213562.Subproblem 1
x + 5 = 1.414213562 Simplifying x + 5 = 1.414213562 Reorder the terms: 5 + x = 1.414213562 Solving 5 + x = 1.414213562 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + x = 1.414213562 + -5 Combine like terms: 5 + -5 = 0 0 + x = 1.414213562 + -5 x = 1.414213562 + -5 Combine like terms: 1.414213562 + -5 = -3.585786438 x = -3.585786438 Simplifying x = -3.585786438Subproblem 2
x + 5 = -1.414213562 Simplifying x + 5 = -1.414213562 Reorder the terms: 5 + x = -1.414213562 Solving 5 + x = -1.414213562 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + x = -1.414213562 + -5 Combine like terms: 5 + -5 = 0 0 + x = -1.414213562 + -5 x = -1.414213562 + -5 Combine like terms: -1.414213562 + -5 = -6.414213562 x = -6.414213562 Simplifying x = -6.414213562Solution
The solution to the problem is based on the solutions from the subproblems. x = {-3.585786438, -6.414213562}Solution
x = {-3.585786438, -6.414213562}
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