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Simplifying x4 + -5x2 + 2 = 0 Reorder the terms: 2 + -5x2 + x4 = 0 Solving 2 + -5x2 + x4 = 0 Solving for variable 'x'. Begin completing the square. Move the constant term to the right: Add '-2' to each side of the equation. 2 + -5x2 + -2 + x4 = 0 + -2 Reorder the terms: 2 + -2 + -5x2 + x4 = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -5x2 + x4 = 0 + -2 -5x2 + x4 = 0 + -2 Combine like terms: 0 + -2 = -2 -5x2 + x4 = -2 The x term is -5x2. 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. -5x2 + 6.25 + x4 = -2 + 6.25 Reorder the terms: 6.25 + -5x2 + x4 = -2 + 6.25 Combine like terms: -2 + 6.25 = 4.25 6.25 + -5x2 + x4 = 4.25 Factor a perfect square on the left side: (x2 + -2.5)(x2 + -2.5) = 4.25 Calculate the square root of the right side: 2.061552813 Break this problem into two subproblems by setting (x2 + -2.5) equal to 2.061552813 and -2.061552813.Subproblem 1
x2 + -2.5 = 2.061552813 Simplifying x2 + -2.5 = 2.061552813 Reorder the terms: -2.5 + x2 = 2.061552813 Solving -2.5 + x2 = 2.061552813 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 + x2 = 2.061552813 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x2 = 2.061552813 + 2.5 x2 = 2.061552813 + 2.5 Combine like terms: 2.061552813 + 2.5 = 4.561552813 x2 = 4.561552813 Simplifying x2 = 4.561552813 Take the square root of each side: x = {-2.135779205, 2.135779205}Subproblem 2
x2 + -2.5 = -2.061552813 Simplifying x2 + -2.5 = -2.061552813 Reorder the terms: -2.5 + x2 = -2.061552813 Solving -2.5 + x2 = -2.061552813 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 + x2 = -2.061552813 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x2 = -2.061552813 + 2.5 x2 = -2.061552813 + 2.5 Combine like terms: -2.061552813 + 2.5 = 0.438447187 x2 = 0.438447187 Simplifying x2 = 0.438447187 Take the square root of each side: x = {-0.662153447, 0.662153447}Solution
The solution to the problem is based on the solutions from the subproblems. x = {-2.135779205, 2.135779205, -0.662153447, 0.662153447}
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