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Simplifying -8x2 + -8x + 2 = 0 Reorder the terms: 2 + -8x + -8x2 = 0 Solving 2 + -8x + -8x2 = 0 Solving for variable 'x'. Factor out the Greatest Common Factor (GCF), '2'. 2(1 + -4x + -4x2) = 0 Ignore the factor 2.Subproblem 1
Set the factor '(1 + -4x + -4x2)' equal to zero and attempt to solve: Simplifying 1 + -4x + -4x2 = 0 Solving 1 + -4x + -4x2 = 0 Begin completing the square. Divide all terms by -4 the coefficient of the squared term: Divide each side by '-4'. -0.25 + x + x2 = 0 Move the constant term to the right: Add '0.25' to each side of the equation. -0.25 + x + 0.25 + x2 = 0 + 0.25 Reorder the terms: -0.25 + 0.25 + x + x2 = 0 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x + x2 = 0 + 0.25 x + x2 = 0 + 0.25 Combine like terms: 0 + 0.25 = 0.25 x + x2 = 0.25 The x term is x. Take half its coefficient (0.5). Square it (0.25) and add it to both sides. Add '0.25' to each side of the equation. + 0.25 + x2 = 0.25 + 0.25 Combine like terms: + 0.25 = 1.25 1.25 + x2 = 0.25 + 0.25 Combine like terms: 0.25 + 0.25 = 0.5 1.25 + x2 = 0.5 Factor a perfect square on the left side: (x + 0.5)(x + 0.5) = 0.5 Calculate the square root of the right side: 0.707106781 Break this problem into two subproblems by setting (x + 0.5) equal to 0.707106781 and -0.707106781.Subproblem 1
x + 0.5 = 0.707106781 Simplifying x + 0.5 = 0.707106781 Reorder the terms: 0.5 + x = 0.707106781 Solving 0.5 + x = 0.707106781 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 0.707106781 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 0.707106781 + -0.5 x = 0.707106781 + -0.5 Combine like terms: 0.707106781 + -0.5 = 0.207106781 x = 0.207106781 Simplifying x = 0.207106781Subproblem 2
x + 0.5 = -0.707106781 Simplifying x + 0.5 = -0.707106781 Reorder the terms: 0.5 + x = -0.707106781 Solving 0.5 + x = -0.707106781 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -0.707106781 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -0.707106781 + -0.5 x = -0.707106781 + -0.5 Combine like terms: -0.707106781 + -0.5 = -1.207106781 x = -1.207106781 Simplifying x = -1.207106781Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.207106781, -1.207106781}Solution
x = {0.207106781, -1.207106781}
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