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Simplifying x2 + 6x = 9 + -1x Reorder the terms: 6x + x2 = 9 + -1x Solving 6x + x2 = 9 + -1x Solving for variable 'x'. Reorder the terms: -9 + 6x + x + x2 = 9 + -1x + -9 + x Combine like terms: 6x + x = 7x -9 + 7x + x2 = 9 + -1x + -9 + x Reorder the terms: -9 + 7x + x2 = 9 + -9 + -1x + x Combine like terms: 9 + -9 = 0 -9 + 7x + x2 = 0 + -1x + x -9 + 7x + x2 = -1x + x Combine like terms: -1x + x = 0 -9 + 7x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '9' to each side of the equation. -9 + 7x + 9 + x2 = 0 + 9 Reorder the terms: -9 + 9 + 7x + x2 = 0 + 9 Combine like terms: -9 + 9 = 0 0 + 7x + x2 = 0 + 9 7x + x2 = 0 + 9 Combine like terms: 0 + 9 = 9 7x + x2 = 9 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 = 9 + 12.25 Reorder the terms: 12.25 + 7x + x2 = 9 + 12.25 Combine like terms: 9 + 12.25 = 21.25 12.25 + 7x + x2 = 21.25 Factor a perfect square on the left side: (x + 3.5)(x + 3.5) = 21.25 Calculate the square root of the right side: 4.609772229 Break this problem into two subproblems by setting (x + 3.5) equal to 4.609772229 and -4.609772229.Subproblem 1
x + 3.5 = 4.609772229 Simplifying x + 3.5 = 4.609772229 Reorder the terms: 3.5 + x = 4.609772229 Solving 3.5 + x = 4.609772229 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 = 4.609772229 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + x = 4.609772229 + -3.5 x = 4.609772229 + -3.5 Combine like terms: 4.609772229 + -3.5 = 1.109772229 x = 1.109772229 Simplifying x = 1.109772229Subproblem 2
x + 3.5 = -4.609772229 Simplifying x + 3.5 = -4.609772229 Reorder the terms: 3.5 + x = -4.609772229 Solving 3.5 + x = -4.609772229 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 = -4.609772229 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + x = -4.609772229 + -3.5 x = -4.609772229 + -3.5 Combine like terms: -4.609772229 + -3.5 = -8.109772229 x = -8.109772229 Simplifying x = -8.109772229Solution
The solution to the problem is based on the solutions from the subproblems. x = {1.109772229, -8.109772229}
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