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Simplifying 6x2 + -18 = 7x Reorder the terms: -18 + 6x2 = 7x Solving -18 + 6x2 = 7x Solving for variable 'x'. Reorder the terms: -18 + -7x + 6x2 = 7x + -7x Combine like terms: 7x + -7x = 0 -18 + -7x + 6x2 = 0 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 = 2.4109760165 x = 2.4109760165 Simplifying x = 2.4109760165Subproblem 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 = -1.2443093495 x = -1.2443093495 Simplifying x = -1.2443093495Solution
The solution to the problem is based on the solutions from the subproblems. x = {2.4109760165, -1.2443093495}
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