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Simplifying x4 + -11x2 + 1 = 0 Reorder the terms: 1 + -11x2 + x4 = 0 Solving 1 + -11x2 + x4 = 0 Solving for variable 'x'. Begin completing the square. Move the constant term to the right: Add '-1' to each side of the equation. 1 + -11x2 + -1 + x4 = 0 + -1 Reorder the terms: 1 + -1 + -11x2 + x4 = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -11x2 + x4 = 0 + -1 -11x2 + x4 = 0 + -1 Combine like terms: 0 + -1 = -1 -11x2 + x4 = -1 The x term is -11x2. Take half its coefficient (-5.5). Square it (30.25) and add it to both sides. Add '30.25' to each side of the equation. -11x2 + 30.25 + x4 = -1 + 30.25 Reorder the terms: 30.25 + -11x2 + x4 = -1 + 30.25 Combine like terms: -1 + 30.25 = 29.25 30.25 + -11x2 + x4 = 29.25 Factor a perfect square on the left side: (x2 + -5.5)(x2 + -5.5) = 29.25 Calculate the square root of the right side: 5.408326913 Break this problem into two subproblems by setting (x2 + -5.5) equal to 5.408326913 and -5.408326913.Subproblem 1
x2 + -5.5 = 5.408326913 Simplifying x2 + -5.5 = 5.408326913 Reorder the terms: -5.5 + x2 = 5.408326913 Solving -5.5 + x2 = 5.408326913 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5.5' to each side of the equation. -5.5 + 5.5 + x2 = 5.408326913 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + x2 = 5.408326913 + 5.5 x2 = 5.408326913 + 5.5 Combine like terms: 5.408326913 + 5.5 = 10.908326913 x2 = 10.908326913 Simplifying x2 = 10.908326913 Take the square root of each side: x = {-3.302775638, 3.302775638}Subproblem 2
x2 + -5.5 = -5.408326913 Simplifying x2 + -5.5 = -5.408326913 Reorder the terms: -5.5 + x2 = -5.408326913 Solving -5.5 + x2 = -5.408326913 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5.5' to each side of the equation. -5.5 + 5.5 + x2 = -5.408326913 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + x2 = -5.408326913 + 5.5 x2 = -5.408326913 + 5.5 Combine like terms: -5.408326913 + 5.5 = 0.091673087 x2 = 0.091673087 Simplifying x2 = 0.091673087 Take the square root of each side: x = {-0.302775638, 0.302775638}Solution
The solution to the problem is based on the solutions from the subproblems. x = {-3.302775638, 3.302775638, -0.302775638, 0.302775638}
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