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Simplifying x2 + 18x + 58 = 0 Reorder the terms: 58 + 18x + x2 = 0 Solving 58 + 18x + x2 = 0 Solving for variable 'x'. Begin completing the square. Move the constant term to the right: Add '-58' to each side of the equation. 58 + 18x + -58 + x2 = 0 + -58 Reorder the terms: 58 + -58 + 18x + x2 = 0 + -58 Combine like terms: 58 + -58 = 0 0 + 18x + x2 = 0 + -58 18x + x2 = 0 + -58 Combine like terms: 0 + -58 = -58 18x + x2 = -58 The x term is 18x. Take half its coefficient (9). Square it (81) and add it to both sides. Add '81' to each side of the equation. 18x + 81 + x2 = -58 + 81 Reorder the terms: 81 + 18x + x2 = -58 + 81 Combine like terms: -58 + 81 = 23 81 + 18x + x2 = 23 Factor a perfect square on the left side: (x + 9)(x + 9) = 23 Calculate the square root of the right side: 4.795831523 Break this problem into two subproblems by setting (x + 9) equal to 4.795831523 and -4.795831523.Subproblem 1
x + 9 = 4.795831523 Simplifying x + 9 = 4.795831523 Reorder the terms: 9 + x = 4.795831523 Solving 9 + x = 4.795831523 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + x = 4.795831523 + -9 Combine like terms: 9 + -9 = 0 0 + x = 4.795831523 + -9 x = 4.795831523 + -9 Combine like terms: 4.795831523 + -9 = -4.204168477 x = -4.204168477 Simplifying x = -4.204168477Subproblem 2
x + 9 = -4.795831523 Simplifying x + 9 = -4.795831523 Reorder the terms: 9 + x = -4.795831523 Solving 9 + x = -4.795831523 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + x = -4.795831523 + -9 Combine like terms: 9 + -9 = 0 0 + x = -4.795831523 + -9 x = -4.795831523 + -9 Combine like terms: -4.795831523 + -9 = -13.795831523 x = -13.795831523 Simplifying x = -13.795831523Solution
The solution to the problem is based on the solutions from the subproblems. x = {-4.204168477, -13.795831523}
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