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Simplifying (2x + 3)(3x) = 86 Reorder the terms: (3 + 2x)(3x) = 86 Remove parenthesis around (3x) (3 + 2x) * 3x = 86 Reorder the terms for easier multiplication: 3x(3 + 2x) = 86 (3 * 3x + 2x * 3x) = 86 (9x + 6x2) = 86 Solving 9x + 6x2 = 86 Solving for variable 'x'. Reorder the terms: -86 + 9x + 6x2 = 86 + -86 Combine like terms: 86 + -86 = 0 -86 + 9x + 6x2 = 0 Begin completing the square. Divide all terms by 6 the coefficient of the squared term: Divide each side by '6'. -14.33333333 + 1.5x + x2 = 0 Move the constant term to the right: Add '14.33333333' to each side of the equation. -14.33333333 + 1.5x + 14.33333333 + x2 = 0 + 14.33333333 Reorder the terms: -14.33333333 + 14.33333333 + 1.5x + x2 = 0 + 14.33333333 Combine like terms: -14.33333333 + 14.33333333 = 0.00000000 0.00000000 + 1.5x + x2 = 0 + 14.33333333 1.5x + x2 = 0 + 14.33333333 Combine like terms: 0 + 14.33333333 = 14.33333333 1.5x + x2 = 14.33333333 The x term is 1.5x. Take half its coefficient (0.75). Square it (0.5625) and add it to both sides. Add '0.5625' to each side of the equation. 1.5x + 0.5625 + x2 = 14.33333333 + 0.5625 Reorder the terms: 0.5625 + 1.5x + x2 = 14.33333333 + 0.5625 Combine like terms: 14.33333333 + 0.5625 = 14.89583333 0.5625 + 1.5x + x2 = 14.89583333 Factor a perfect square on the left side: (x + 0.75)(x + 0.75) = 14.89583333 Calculate the square root of the right side: 3.859512059 Break this problem into two subproblems by setting (x + 0.75) equal to 3.859512059 and -3.859512059.Subproblem 1
x + 0.75 = 3.859512059 Simplifying x + 0.75 = 3.859512059 Reorder the terms: 0.75 + x = 3.859512059 Solving 0.75 + x = 3.859512059 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.75' to each side of the equation. 0.75 + -0.75 + x = 3.859512059 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + x = 3.859512059 + -0.75 x = 3.859512059 + -0.75 Combine like terms: 3.859512059 + -0.75 = 3.109512059 x = 3.109512059 Simplifying x = 3.109512059Subproblem 2
x + 0.75 = -3.859512059 Simplifying x + 0.75 = -3.859512059 Reorder the terms: 0.75 + x = -3.859512059 Solving 0.75 + x = -3.859512059 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.75' to each side of the equation. 0.75 + -0.75 + x = -3.859512059 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + x = -3.859512059 + -0.75 x = -3.859512059 + -0.75 Combine like terms: -3.859512059 + -0.75 = -4.609512059 x = -4.609512059 Simplifying x = -4.609512059Solution
The solution to the problem is based on the solutions from the subproblems. x = {3.109512059, -4.609512059}
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