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Simplifying x2 + 6x + 27 = 66 Reorder the terms: 27 + 6x + x2 = 66 Solving 27 + 6x + x2 = 66 Solving for variable 'x'. Reorder the terms: 27 + -66 + 6x + x2 = 66 + -66 Combine like terms: 27 + -66 = -39 -39 + 6x + x2 = 66 + -66 Combine like terms: 66 + -66 = 0 -39 + 6x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '39' to each side of the equation. -39 + 6x + 39 + x2 = 0 + 39 Reorder the terms: -39 + 39 + 6x + x2 = 0 + 39 Combine like terms: -39 + 39 = 0 0 + 6x + x2 = 0 + 39 6x + x2 = 0 + 39 Combine like terms: 0 + 39 = 39 6x + x2 = 39 The x term is 6x. Take half its coefficient (3). Square it (9) and add it to both sides. Add '9' to each side of the equation. 6x + 9 + x2 = 39 + 9 Reorder the terms: 9 + 6x + x2 = 39 + 9 Combine like terms: 39 + 9 = 48 9 + 6x + x2 = 48 Factor a perfect square on the left side: (x + 3)(x + 3) = 48 Calculate the square root of the right side: 6.92820323 Break this problem into two subproblems by setting (x + 3) equal to 6.92820323 and -6.92820323.Subproblem 1
x + 3 = 6.92820323 Simplifying x + 3 = 6.92820323 Reorder the terms: 3 + x = 6.92820323 Solving 3 + x = 6.92820323 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = 6.92820323 + -3 Combine like terms: 3 + -3 = 0 0 + x = 6.92820323 + -3 x = 6.92820323 + -3 Combine like terms: 6.92820323 + -3 = 3.92820323 x = 3.92820323 Simplifying x = 3.92820323Subproblem 2
x + 3 = -6.92820323 Simplifying x + 3 = -6.92820323 Reorder the terms: 3 + x = -6.92820323 Solving 3 + x = -6.92820323 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = -6.92820323 + -3 Combine like terms: 3 + -3 = 0 0 + x = -6.92820323 + -3 x = -6.92820323 + -3 Combine like terms: -6.92820323 + -3 = -9.92820323 x = -9.92820323 Simplifying x = -9.92820323Solution
The solution to the problem is based on the solutions from the subproblems. x = {3.92820323, -9.92820323}
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