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Simplifying x4 + -6x2 + -18 = 0 Reorder the terms: -18 + -6x2 + x4 = 0 Solving -18 + -6x2 + x4 = 0 Solving for variable 'x'. Begin completing the square. Move the constant term to the right: Add '18' to each side of the equation. -18 + -6x2 + 18 + x4 = 0 + 18 Reorder the terms: -18 + 18 + -6x2 + x4 = 0 + 18 Combine like terms: -18 + 18 = 0 0 + -6x2 + x4 = 0 + 18 -6x2 + x4 = 0 + 18 Combine like terms: 0 + 18 = 18 -6x2 + x4 = 18 The x term is -6x2. Take half its coefficient (-3). Square it (9) and add it to both sides. Add '9' to each side of the equation. -6x2 + 9 + x4 = 18 + 9 Reorder the terms: 9 + -6x2 + x4 = 18 + 9 Combine like terms: 18 + 9 = 27 9 + -6x2 + x4 = 27 Factor a perfect square on the left side: (x2 + -3)(x2 + -3) = 27 Calculate the square root of the right side: 5.196152423 Break this problem into two subproblems by setting (x2 + -3) equal to 5.196152423 and -5.196152423.Subproblem 1
x2 + -3 = 5.196152423 Simplifying x2 + -3 = 5.196152423 Reorder the terms: -3 + x2 = 5.196152423 Solving -3 + x2 = 5.196152423 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + x2 = 5.196152423 + 3 Combine like terms: -3 + 3 = 0 0 + x2 = 5.196152423 + 3 x2 = 5.196152423 + 3 Combine like terms: 5.196152423 + 3 = 8.196152423 x2 = 8.196152423 Simplifying x2 = 8.196152423 Take the square root of each side: x = {-2.862892318, 2.862892318}Subproblem 2
x2 + -3 = -5.196152423 Simplifying x2 + -3 = -5.196152423 Reorder the terms: -3 + x2 = -5.196152423 Solving -3 + x2 = -5.196152423 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + x2 = -5.196152423 + 3 Combine like terms: -3 + 3 = 0 0 + x2 = -5.196152423 + 3 x2 = -5.196152423 + 3 Combine like terms: -5.196152423 + 3 = -2.196152423 x2 = -2.196152423 Simplifying x2 = -2.196152423 Reorder the terms: 2.196152423 + x2 = -2.196152423 + 2.196152423 Combine like terms: -2.196152423 + 2.196152423 = 0.000000000 2.196152423 + x2 = 0.000000000 The solution to this equation could not be determined.This subproblem is being ignored because a solution could not be determined. The solution to this equation could not be determined.
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