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Simplifying 6x2 + 7x + -18 = 0 Reorder the terms: -18 + 7x + 6x2 = 0 Solving -18 + 7x + 6x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 6 the coefficient of the squared term: Divide each side by '6'. -3 + 1.166666667x + x2 = 0 Move the constant term to the right: Add '3' to each side of the equation. -3 + 1.166666667x + 3 + x2 = 0 + 3 Reorder the terms: -3 + 3 + 1.166666667x + x2 = 0 + 3 Combine like terms: -3 + 3 = 0 0 + 1.166666667x + x2 = 0 + 3 1.166666667x + x2 = 0 + 3 Combine like terms: 0 + 3 = 3 1.166666667x + x2 = 3 The x term is 1.166666667x. Take half its coefficient (0.5833333335). Square it (0.3402777780) and add it to both sides. Add '0.3402777780' to each side of the equation. 1.166666667x + 0.3402777780 + x2 = 3 + 0.3402777780 Reorder the terms: 0.3402777780 + 1.166666667x + x2 = 3 + 0.3402777780 Combine like terms: 3 + 0.3402777780 = 3.340277778 0.3402777780 + 1.166666667x + x2 = 3.340277778 Factor a perfect square on the left side: (x + 0.5833333335)(x + 0.5833333335) = 3.340277778 Calculate the square root of the right side: 1.827642683 Break this problem into two subproblems by setting (x + 0.5833333335) equal to 1.827642683 and -1.827642683.Subproblem 1
x + 0.5833333335 = 1.827642683 Simplifying x + 0.5833333335 = 1.827642683 Reorder the terms: 0.5833333335 + x = 1.827642683 Solving 0.5833333335 + x = 1.827642683 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5833333335' to each side of the equation. 0.5833333335 + -0.5833333335 + x = 1.827642683 + -0.5833333335 Combine like terms: 0.5833333335 + -0.5833333335 = 0.0000000000 0.0000000000 + x = 1.827642683 + -0.5833333335 x = 1.827642683 + -0.5833333335 Combine like terms: 1.827642683 + -0.5833333335 = 1.2443093495 x = 1.2443093495 Simplifying x = 1.2443093495Subproblem 2
x + 0.5833333335 = -1.827642683 Simplifying x + 0.5833333335 = -1.827642683 Reorder the terms: 0.5833333335 + x = -1.827642683 Solving 0.5833333335 + x = -1.827642683 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5833333335' to each side of the equation. 0.5833333335 + -0.5833333335 + x = -1.827642683 + -0.5833333335 Combine like terms: 0.5833333335 + -0.5833333335 = 0.0000000000 0.0000000000 + x = -1.827642683 + -0.5833333335 x = -1.827642683 + -0.5833333335 Combine like terms: -1.827642683 + -0.5833333335 = -2.4109760165 x = -2.4109760165 Simplifying x = -2.4109760165Solution
The solution to the problem is based on the solutions from the subproblems. x = {1.2443093495, -2.4109760165}
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