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Simplifying (2x + 3)(2x + 3.25) + -9.75 = 15 Reorder the terms: (3 + 2x)(2x + 3.25) + -9.75 = 15 Reorder the terms: (3 + 2x)(3.25 + 2x) + -9.75 = 15 Multiply (3 + 2x) * (3.25 + 2x) (3(3.25 + 2x) + 2x * (3.25 + 2x)) + -9.75 = 15 ((3.25 * 3 + 2x * 3) + 2x * (3.25 + 2x)) + -9.75 = 15 ((9.75 + 6x) + 2x * (3.25 + 2x)) + -9.75 = 15 (9.75 + 6x + (3.25 * 2x + 2x * 2x)) + -9.75 = 15 (9.75 + 6x + (6.5x + 4x2)) + -9.75 = 15 Combine like terms: 6x + 6.5x = 12.5x (9.75 + 12.5x + 4x2) + -9.75 = 15 Reorder the terms: 9.75 + -9.75 + 12.5x + 4x2 = 15 Combine like terms: 9.75 + -9.75 = 0.00 0.00 + 12.5x + 4x2 = 15 12.5x + 4x2 = 15 Solving 12.5x + 4x2 = 15 Solving for variable 'x'. Reorder the terms: -15 + 12.5x + 4x2 = 15 + -15 Combine like terms: 15 + -15 = 0 -15 + 12.5x + 4x2 = 0 Begin completing the square. Divide all terms by 4 the coefficient of the squared term: Divide each side by '4'. -3.75 + 3.125x + x2 = 0 Move the constant term to the right: Add '3.75' to each side of the equation. -3.75 + 3.125x + 3.75 + x2 = 0 + 3.75 Reorder the terms: -3.75 + 3.75 + 3.125x + x2 = 0 + 3.75 Combine like terms: -3.75 + 3.75 = 0.00 0.00 + 3.125x + x2 = 0 + 3.75 3.125x + x2 = 0 + 3.75 Combine like terms: 0 + 3.75 = 3.75 3.125x + x2 = 3.75 The x term is 3.125x. Take half its coefficient (1.5625). Square it (2.44140625) and add it to both sides. Add '2.44140625' to each side of the equation. 3.125x + 2.44140625 + x2 = 3.75 + 2.44140625 Reorder the terms: 2.44140625 + 3.125x + x2 = 3.75 + 2.44140625 Combine like terms: 3.75 + 2.44140625 = 6.19140625 2.44140625 + 3.125x + x2 = 6.19140625 Factor a perfect square on the left side: (x + 1.5625)(x + 1.5625) = 6.19140625 Calculate the square root of the right side: 2.488253655 Break this problem into two subproblems by setting (x + 1.5625) equal to 2.488253655 and -2.488253655.Subproblem 1
x + 1.5625 = 2.488253655 Simplifying x + 1.5625 = 2.488253655 Reorder the terms: 1.5625 + x = 2.488253655 Solving 1.5625 + x = 2.488253655 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.5625' to each side of the equation. 1.5625 + -1.5625 + x = 2.488253655 + -1.5625 Combine like terms: 1.5625 + -1.5625 = 0.0000 0.0000 + x = 2.488253655 + -1.5625 x = 2.488253655 + -1.5625 Combine like terms: 2.488253655 + -1.5625 = 0.925753655 x = 0.925753655 Simplifying x = 0.925753655Subproblem 2
x + 1.5625 = -2.488253655 Simplifying x + 1.5625 = -2.488253655 Reorder the terms: 1.5625 + x = -2.488253655 Solving 1.5625 + x = -2.488253655 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.5625' to each side of the equation. 1.5625 + -1.5625 + x = -2.488253655 + -1.5625 Combine like terms: 1.5625 + -1.5625 = 0.0000 0.0000 + x = -2.488253655 + -1.5625 x = -2.488253655 + -1.5625 Combine like terms: -2.488253655 + -1.5625 = -4.050753655 x = -4.050753655 Simplifying x = -4.050753655Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.925753655, -4.050753655}
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