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Simplifying 3x2 + 20x + -3 = 0 Reorder the terms: -3 + 20x + 3x2 = 0 Solving -3 + 20x + 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'. -1 + 6.666666667x + x2 = 0 Move the constant term to the right: Add '1' to each side of the equation. -1 + 6.666666667x + 1 + x2 = 0 + 1 Reorder the terms: -1 + 1 + 6.666666667x + x2 = 0 + 1 Combine like terms: -1 + 1 = 0 0 + 6.666666667x + x2 = 0 + 1 6.666666667x + x2 = 0 + 1 Combine like terms: 0 + 1 = 1 6.666666667x + x2 = 1 The x term is 6.666666667x. Take half its coefficient (3.333333334). Square it (11.11111112) and add it to both sides. Add '11.11111112' to each side of the equation. 6.666666667x + 11.11111112 + x2 = 1 + 11.11111112 Reorder the terms: 11.11111112 + 6.666666667x + x2 = 1 + 11.11111112 Combine like terms: 1 + 11.11111112 = 12.11111112 11.11111112 + 6.666666667x + x2 = 12.11111112 Factor a perfect square on the left side: (x + 3.333333334)(x + 3.333333334) = 12.11111112 Calculate the square root of the right side: 3.480102171 Break this problem into two subproblems by setting (x + 3.333333334) equal to 3.480102171 and -3.480102171.Subproblem 1
x + 3.333333334 = 3.480102171 Simplifying x + 3.333333334 = 3.480102171 Reorder the terms: 3.333333334 + x = 3.480102171 Solving 3.333333334 + x = 3.480102171 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.333333334' to each side of the equation. 3.333333334 + -3.333333334 + x = 3.480102171 + -3.333333334 Combine like terms: 3.333333334 + -3.333333334 = 0.000000000 0.000000000 + x = 3.480102171 + -3.333333334 x = 3.480102171 + -3.333333334 Combine like terms: 3.480102171 + -3.333333334 = 0.146768837 x = 0.146768837 Simplifying x = 0.146768837Subproblem 2
x + 3.333333334 = -3.480102171 Simplifying x + 3.333333334 = -3.480102171 Reorder the terms: 3.333333334 + x = -3.480102171 Solving 3.333333334 + x = -3.480102171 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.333333334' to each side of the equation. 3.333333334 + -3.333333334 + x = -3.480102171 + -3.333333334 Combine like terms: 3.333333334 + -3.333333334 = 0.000000000 0.000000000 + x = -3.480102171 + -3.333333334 x = -3.480102171 + -3.333333334 Combine like terms: -3.480102171 + -3.333333334 = -6.813435505 x = -6.813435505 Simplifying x = -6.813435505Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.146768837, -6.813435505}
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