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Simplifying x2 + 6x + 9 = 88 Reorder the terms: 9 + 6x + x2 = 88 Solving 9 + 6x + x2 = 88 Solving for variable 'x'. Reorder the terms: 9 + -88 + 6x + x2 = 88 + -88 Combine like terms: 9 + -88 = -79 -79 + 6x + x2 = 88 + -88 Combine like terms: 88 + -88 = 0 -79 + 6x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '79' to each side of the equation. -79 + 6x + 79 + x2 = 0 + 79 Reorder the terms: -79 + 79 + 6x + x2 = 0 + 79 Combine like terms: -79 + 79 = 0 0 + 6x + x2 = 0 + 79 6x + x2 = 0 + 79 Combine like terms: 0 + 79 = 79 6x + x2 = 79 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 = 79 + 9 Reorder the terms: 9 + 6x + x2 = 79 + 9 Combine like terms: 79 + 9 = 88 9 + 6x + x2 = 88 Factor a perfect square on the left side: (x + 3)(x + 3) = 88 Calculate the square root of the right side: 9.38083152 Break this problem into two subproblems by setting (x + 3) equal to 9.38083152 and -9.38083152.Subproblem 1
x + 3 = 9.38083152 Simplifying x + 3 = 9.38083152 Reorder the terms: 3 + x = 9.38083152 Solving 3 + x = 9.38083152 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 = 9.38083152 + -3 Combine like terms: 3 + -3 = 0 0 + x = 9.38083152 + -3 x = 9.38083152 + -3 Combine like terms: 9.38083152 + -3 = 6.38083152 x = 6.38083152 Simplifying x = 6.38083152Subproblem 2
x + 3 = -9.38083152 Simplifying x + 3 = -9.38083152 Reorder the terms: 3 + x = -9.38083152 Solving 3 + x = -9.38083152 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 = -9.38083152 + -3 Combine like terms: 3 + -3 = 0 0 + x = -9.38083152 + -3 x = -9.38083152 + -3 Combine like terms: -9.38083152 + -3 = -12.38083152 x = -12.38083152 Simplifying x = -12.38083152Solution
The solution to the problem is based on the solutions from the subproblems. x = {6.38083152, -12.38083152}
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