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Simplifying (x + 8)(x + 2) = 39 Reorder the terms: (8 + x)(x + 2) = 39 Reorder the terms: (8 + x)(2 + x) = 39 Multiply (8 + x) * (2 + x) (8(2 + x) + x(2 + x)) = 39 ((2 * 8 + x * 8) + x(2 + x)) = 39 ((16 + 8x) + x(2 + x)) = 39 (16 + 8x + (2 * x + x * x)) = 39 (16 + 8x + (2x + x2)) = 39 Combine like terms: 8x + 2x = 10x (16 + 10x + x2) = 39 Solving 16 + 10x + x2 = 39 Solving for variable 'x'. Reorder the terms: 16 + -39 + 10x + x2 = 39 + -39 Combine like terms: 16 + -39 = -23 -23 + 10x + x2 = 39 + -39 Combine like terms: 39 + -39 = 0 -23 + 10x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '23' to each side of the equation. -23 + 10x + 23 + x2 = 0 + 23 Reorder the terms: -23 + 23 + 10x + x2 = 0 + 23 Combine like terms: -23 + 23 = 0 0 + 10x + x2 = 0 + 23 10x + x2 = 0 + 23 Combine like terms: 0 + 23 = 23 10x + x2 = 23 The x term is 10x. Take half its coefficient (5). Square it (25) and add it to both sides. Add '25' to each side of the equation. 10x + 25 + x2 = 23 + 25 Reorder the terms: 25 + 10x + x2 = 23 + 25 Combine like terms: 23 + 25 = 48 25 + 10x + x2 = 48 Factor a perfect square on the left side: (x + 5)(x + 5) = 48 Calculate the square root of the right side: 6.92820323 Break this problem into two subproblems by setting (x + 5) equal to 6.92820323 and -6.92820323.Subproblem 1
x + 5 = 6.92820323 Simplifying x + 5 = 6.92820323 Reorder the terms: 5 + x = 6.92820323 Solving 5 + x = 6.92820323 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + x = 6.92820323 + -5 Combine like terms: 5 + -5 = 0 0 + x = 6.92820323 + -5 x = 6.92820323 + -5 Combine like terms: 6.92820323 + -5 = 1.92820323 x = 1.92820323 Simplifying x = 1.92820323Subproblem 2
x + 5 = -6.92820323 Simplifying x + 5 = -6.92820323 Reorder the terms: 5 + x = -6.92820323 Solving 5 + x = -6.92820323 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + x = -6.92820323 + -5 Combine like terms: 5 + -5 = 0 0 + x = -6.92820323 + -5 x = -6.92820323 + -5 Combine like terms: -6.92820323 + -5 = -11.92820323 x = -11.92820323 Simplifying x = -11.92820323Solution
The solution to the problem is based on the solutions from the subproblems. x = {1.92820323, -11.92820323}
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