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Simplifying 11x2 + x + 1 = 0 Reorder the terms: 1 + x + 11x2 = 0 Solving 1 + x + 11x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 11 the coefficient of the squared term: Divide each side by '11'. 0.09090909091 + 0.09090909091x + x2 = 0 Move the constant term to the right: Add '-0.09090909091' to each side of the equation. 0.09090909091 + 0.09090909091x + -0.09090909091 + x2 = 0 + -0.09090909091 Reorder the terms: 0.09090909091 + -0.09090909091 + 0.09090909091x + x2 = 0 + -0.09090909091 Combine like terms: 0.09090909091 + -0.09090909091 = 0.00000000000 0.00000000000 + 0.09090909091x + x2 = 0 + -0.09090909091 0.09090909091x + x2 = 0 + -0.09090909091 Combine like terms: 0 + -0.09090909091 = -0.09090909091 0.09090909091x + x2 = -0.09090909091 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. 0.09090909091x + 0.25 + x2 = -0.09090909091 + 0.25 Reorder the terms: 0.25 + 0.09090909091x + x2 = -0.09090909091 + 0.25 Combine like terms: -0.09090909091 + 0.25 = 0.15909090909 0.25 + 0.09090909091x + x2 = 0.15909090909 Factor a perfect square on the left side: (x + 0.5)(x + 0.5) = 0.15909090909 Calculate the square root of the right side: 0.398862018 Break this problem into two subproblems by setting (x + 0.5) equal to 0.398862018 and -0.398862018.Subproblem 1
x + 0.5 = 0.398862018 Simplifying x + 0.5 = 0.398862018 Reorder the terms: 0.5 + x = 0.398862018 Solving 0.5 + x = 0.398862018 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 = 0.398862018 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 0.398862018 + -0.5 x = 0.398862018 + -0.5 Combine like terms: 0.398862018 + -0.5 = -0.101137982 x = -0.101137982 Simplifying x = -0.101137982Subproblem 2
x + 0.5 = -0.398862018 Simplifying x + 0.5 = -0.398862018 Reorder the terms: 0.5 + x = -0.398862018 Solving 0.5 + x = -0.398862018 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 = -0.398862018 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -0.398862018 + -0.5 x = -0.398862018 + -0.5 Combine like terms: -0.398862018 + -0.5 = -0.898862018 x = -0.898862018 Simplifying x = -0.898862018Solution
The solution to the problem is based on the solutions from the subproblems. x = {-0.101137982, -0.898862018}
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