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Simplifying (x + 4)(x + 3) = 13 Reorder the terms: (4 + x)(x + 3) = 13 Reorder the terms: (4 + x)(3 + x) = 13 Multiply (4 + x) * (3 + x) (4(3 + x) + x(3 + x)) = 13 ((3 * 4 + x * 4) + x(3 + x)) = 13 ((12 + 4x) + x(3 + x)) = 13 (12 + 4x + (3 * x + x * x)) = 13 (12 + 4x + (3x + x2)) = 13 Combine like terms: 4x + 3x = 7x (12 + 7x + x2) = 13 Solving 12 + 7x + x2 = 13 Solving for variable 'x'. Reorder the terms: 12 + -13 + 7x + x2 = 13 + -13 Combine like terms: 12 + -13 = -1 -1 + 7x + x2 = 13 + -13 Combine like terms: 13 + -13 = 0 -1 + 7x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '1' to each side of the equation. -1 + 7x + 1 + x2 = 0 + 1 Reorder the terms: -1 + 1 + 7x + x2 = 0 + 1 Combine like terms: -1 + 1 = 0 0 + 7x + x2 = 0 + 1 7x + x2 = 0 + 1 Combine like terms: 0 + 1 = 1 7x + x2 = 1 The x term is 7x. Take half its coefficient (3.5). Square it (12.25) and add it to both sides. Add '12.25' to each side of the equation. 7x + 12.25 + x2 = 1 + 12.25 Reorder the terms: 12.25 + 7x + x2 = 1 + 12.25 Combine like terms: 1 + 12.25 = 13.25 12.25 + 7x + x2 = 13.25 Factor a perfect square on the left side: (x + 3.5)(x + 3.5) = 13.25 Calculate the square root of the right side: 3.640054945 Break this problem into two subproblems by setting (x + 3.5) equal to 3.640054945 and -3.640054945.Subproblem 1
x + 3.5 = 3.640054945 Simplifying x + 3.5 = 3.640054945 Reorder the terms: 3.5 + x = 3.640054945 Solving 3.5 + x = 3.640054945 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.5' to each side of the equation. 3.5 + -3.5 + x = 3.640054945 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + x = 3.640054945 + -3.5 x = 3.640054945 + -3.5 Combine like terms: 3.640054945 + -3.5 = 0.140054945 x = 0.140054945 Simplifying x = 0.140054945Subproblem 2
x + 3.5 = -3.640054945 Simplifying x + 3.5 = -3.640054945 Reorder the terms: 3.5 + x = -3.640054945 Solving 3.5 + x = -3.640054945 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.5' to each side of the equation. 3.5 + -3.5 + x = -3.640054945 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + x = -3.640054945 + -3.5 x = -3.640054945 + -3.5 Combine like terms: -3.640054945 + -3.5 = -7.140054945 x = -7.140054945 Simplifying x = -7.140054945Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.140054945, -7.140054945}
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