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Simplifying 3x2 + 14x + -18 = 0 Reorder the terms: -18 + 14x + 3x2 = 0 Solving -18 + 14x + 3x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 3 the coefficient of the squared term: Divide each side by '3'. -6 + 4.666666667x + x2 = 0 Move the constant term to the right: Add '6' to each side of the equation. -6 + 4.666666667x + 6 + x2 = 0 + 6 Reorder the terms: -6 + 6 + 4.666666667x + x2 = 0 + 6 Combine like terms: -6 + 6 = 0 0 + 4.666666667x + x2 = 0 + 6 4.666666667x + x2 = 0 + 6 Combine like terms: 0 + 6 = 6 4.666666667x + x2 = 6 The x term is 4.666666667x. Take half its coefficient (2.333333334). Square it (5.444444448) and add it to both sides. Add '5.444444448' to each side of the equation. 4.666666667x + 5.444444448 + x2 = 6 + 5.444444448 Reorder the terms: 5.444444448 + 4.666666667x + x2 = 6 + 5.444444448 Combine like terms: 6 + 5.444444448 = 11.444444448 5.444444448 + 4.666666667x + x2 = 11.444444448 Factor a perfect square on the left side: (x + 2.333333334)(x + 2.333333334) = 11.444444448 Calculate the square root of the right side: 3.382963856 Break this problem into two subproblems by setting (x + 2.333333334) equal to 3.382963856 and -3.382963856.Subproblem 1
x + 2.333333334 = 3.382963856 Simplifying x + 2.333333334 = 3.382963856 Reorder the terms: 2.333333334 + x = 3.382963856 Solving 2.333333334 + x = 3.382963856 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.333333334' to each side of the equation. 2.333333334 + -2.333333334 + x = 3.382963856 + -2.333333334 Combine like terms: 2.333333334 + -2.333333334 = 0.000000000 0.000000000 + x = 3.382963856 + -2.333333334 x = 3.382963856 + -2.333333334 Combine like terms: 3.382963856 + -2.333333334 = 1.049630522 x = 1.049630522 Simplifying x = 1.049630522Subproblem 2
x + 2.333333334 = -3.382963856 Simplifying x + 2.333333334 = -3.382963856 Reorder the terms: 2.333333334 + x = -3.382963856 Solving 2.333333334 + x = -3.382963856 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.333333334' to each side of the equation. 2.333333334 + -2.333333334 + x = -3.382963856 + -2.333333334 Combine like terms: 2.333333334 + -2.333333334 = 0.000000000 0.000000000 + x = -3.382963856 + -2.333333334 x = -3.382963856 + -2.333333334 Combine like terms: -3.382963856 + -2.333333334 = -5.71629719 x = -5.71629719 Simplifying x = -5.71629719Solution
The solution to the problem is based on the solutions from the subproblems. x = {1.049630522, -5.71629719}
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