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Simplifying 11x2 + 10x + -9 = 0 Reorder the terms: -9 + 10x + 11x2 = 0 Solving -9 + 10x + 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'. -0.8181818182 + 0.9090909091x + x2 = 0 Move the constant term to the right: Add '0.8181818182' to each side of the equation. -0.8181818182 + 0.9090909091x + 0.8181818182 + x2 = 0 + 0.8181818182 Reorder the terms: -0.8181818182 + 0.8181818182 + 0.9090909091x + x2 = 0 + 0.8181818182 Combine like terms: -0.8181818182 + 0.8181818182 = 0.0000000000 0.0000000000 + 0.9090909091x + x2 = 0 + 0.8181818182 0.9090909091x + x2 = 0 + 0.8181818182 Combine like terms: 0 + 0.8181818182 = 0.8181818182 0.9090909091x + x2 = 0.8181818182 The x term is 0.9090909091x. Take half its coefficient (0.4545454546). Square it (0.2066115703) and add it to both sides. Add '0.2066115703' to each side of the equation. 0.9090909091x + 0.2066115703 + x2 = 0.8181818182 + 0.2066115703 Reorder the terms: 0.2066115703 + 0.9090909091x + x2 = 0.8181818182 + 0.2066115703 Combine like terms: 0.8181818182 + 0.2066115703 = 1.0247933885 0.2066115703 + 0.9090909091x + x2 = 1.0247933885 Factor a perfect square on the left side: (x + 0.4545454546)(x + 0.4545454546) = 1.0247933885 Calculate the square root of the right side: 1.012320793 Break this problem into two subproblems by setting (x + 0.4545454546) equal to 1.012320793 and -1.012320793.Subproblem 1
x + 0.4545454546 = 1.012320793 Simplifying x + 0.4545454546 = 1.012320793 Reorder the terms: 0.4545454546 + x = 1.012320793 Solving 0.4545454546 + x = 1.012320793 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.4545454546' to each side of the equation. 0.4545454546 + -0.4545454546 + x = 1.012320793 + -0.4545454546 Combine like terms: 0.4545454546 + -0.4545454546 = 0.0000000000 0.0000000000 + x = 1.012320793 + -0.4545454546 x = 1.012320793 + -0.4545454546 Combine like terms: 1.012320793 + -0.4545454546 = 0.5577753384 x = 0.5577753384 Simplifying x = 0.5577753384Subproblem 2
x + 0.4545454546 = -1.012320793 Simplifying x + 0.4545454546 = -1.012320793 Reorder the terms: 0.4545454546 + x = -1.012320793 Solving 0.4545454546 + x = -1.012320793 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.4545454546' to each side of the equation. 0.4545454546 + -0.4545454546 + x = -1.012320793 + -0.4545454546 Combine like terms: 0.4545454546 + -0.4545454546 = 0.0000000000 0.0000000000 + x = -1.012320793 + -0.4545454546 x = -1.012320793 + -0.4545454546 Combine like terms: -1.012320793 + -0.4545454546 = -1.4668662476 x = -1.4668662476 Simplifying x = -1.4668662476Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.5577753384, -1.4668662476}
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