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Simplifying x2 + 9x + 18 = 119 Reorder the terms: 18 + 9x + x2 = 119 Solving 18 + 9x + x2 = 119 Solving for variable 'x'. Reorder the terms: 18 + -119 + 9x + x2 = 119 + -119 Combine like terms: 18 + -119 = -101 -101 + 9x + x2 = 119 + -119 Combine like terms: 119 + -119 = 0 -101 + 9x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '101' to each side of the equation. -101 + 9x + 101 + x2 = 0 + 101 Reorder the terms: -101 + 101 + 9x + x2 = 0 + 101 Combine like terms: -101 + 101 = 0 0 + 9x + x2 = 0 + 101 9x + x2 = 0 + 101 Combine like terms: 0 + 101 = 101 9x + x2 = 101 The x term is 9x. Take half its coefficient (4.5). Square it (20.25) and add it to both sides. Add '20.25' to each side of the equation. 9x + 20.25 + x2 = 101 + 20.25 Reorder the terms: 20.25 + 9x + x2 = 101 + 20.25 Combine like terms: 101 + 20.25 = 121.25 20.25 + 9x + x2 = 121.25 Factor a perfect square on the left side: (x + 4.5)(x + 4.5) = 121.25 Calculate the square root of the right side: 11.011357773 Break this problem into two subproblems by setting (x + 4.5) equal to 11.011357773 and -11.011357773.Subproblem 1
x + 4.5 = 11.011357773 Simplifying x + 4.5 = 11.011357773 Reorder the terms: 4.5 + x = 11.011357773 Solving 4.5 + x = 11.011357773 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.5' to each side of the equation. 4.5 + -4.5 + x = 11.011357773 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + x = 11.011357773 + -4.5 x = 11.011357773 + -4.5 Combine like terms: 11.011357773 + -4.5 = 6.511357773 x = 6.511357773 Simplifying x = 6.511357773Subproblem 2
x + 4.5 = -11.011357773 Simplifying x + 4.5 = -11.011357773 Reorder the terms: 4.5 + x = -11.011357773 Solving 4.5 + x = -11.011357773 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.5' to each side of the equation. 4.5 + -4.5 + x = -11.011357773 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + x = -11.011357773 + -4.5 x = -11.011357773 + -4.5 Combine like terms: -11.011357773 + -4.5 = -15.511357773 x = -15.511357773 Simplifying x = -15.511357773Solution
The solution to the problem is based on the solutions from the subproblems. x = {6.511357773, -15.511357773}
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