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Simplifying 7x + 18 + x2 = 180 Reorder the terms: 18 + 7x + x2 = 180 Solving 18 + 7x + x2 = 180 Solving for variable 'x'. Reorder the terms: 18 + -180 + 7x + x2 = 180 + -180 Combine like terms: 18 + -180 = -162 -162 + 7x + x2 = 180 + -180 Combine like terms: 180 + -180 = 0 -162 + 7x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '162' to each side of the equation. -162 + 7x + 162 + x2 = 0 + 162 Reorder the terms: -162 + 162 + 7x + x2 = 0 + 162 Combine like terms: -162 + 162 = 0 0 + 7x + x2 = 0 + 162 7x + x2 = 0 + 162 Combine like terms: 0 + 162 = 162 7x + x2 = 162 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 = 162 + 12.25 Reorder the terms: 12.25 + 7x + x2 = 162 + 12.25 Combine like terms: 162 + 12.25 = 174.25 12.25 + 7x + x2 = 174.25 Factor a perfect square on the left side: (x + 3.5)(x + 3.5) = 174.25 Calculate the square root of the right side: 13.200378782 Break this problem into two subproblems by setting (x + 3.5) equal to 13.200378782 and -13.200378782.Subproblem 1
x + 3.5 = 13.200378782 Simplifying x + 3.5 = 13.200378782 Reorder the terms: 3.5 + x = 13.200378782 Solving 3.5 + x = 13.200378782 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 = 13.200378782 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + x = 13.200378782 + -3.5 x = 13.200378782 + -3.5 Combine like terms: 13.200378782 + -3.5 = 9.700378782 x = 9.700378782 Simplifying x = 9.700378782Subproblem 2
x + 3.5 = -13.200378782 Simplifying x + 3.5 = -13.200378782 Reorder the terms: 3.5 + x = -13.200378782 Solving 3.5 + x = -13.200378782 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 = -13.200378782 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + x = -13.200378782 + -3.5 x = -13.200378782 + -3.5 Combine like terms: -13.200378782 + -3.5 = -16.700378782 x = -16.700378782 Simplifying x = -16.700378782Solution
The solution to the problem is based on the solutions from the subproblems. x = {9.700378782, -16.700378782}
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