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Simplifying X2 + 6X + -2 = 9 Reorder the terms: -2 + 6X + X2 = 9 Solving -2 + 6X + X2 = 9 Solving for variable 'X'. Reorder the terms: -2 + -9 + 6X + X2 = 9 + -9 Combine like terms: -2 + -9 = -11 -11 + 6X + X2 = 9 + -9 Combine like terms: 9 + -9 = 0 -11 + 6X + X2 = 0 Begin completing the square. Move the constant term to the right: Add '11' to each side of the equation. -11 + 6X + 11 + X2 = 0 + 11 Reorder the terms: -11 + 11 + 6X + X2 = 0 + 11 Combine like terms: -11 + 11 = 0 0 + 6X + X2 = 0 + 11 6X + X2 = 0 + 11 Combine like terms: 0 + 11 = 11 6X + X2 = 11 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 = 11 + 9 Reorder the terms: 9 + 6X + X2 = 11 + 9 Combine like terms: 11 + 9 = 20 9 + 6X + X2 = 20 Factor a perfect square on the left side: (X + 3)(X + 3) = 20 Calculate the square root of the right side: 4.472135955 Break this problem into two subproblems by setting (X + 3) equal to 4.472135955 and -4.472135955.Subproblem 1
X + 3 = 4.472135955 Simplifying X + 3 = 4.472135955 Reorder the terms: 3 + X = 4.472135955 Solving 3 + X = 4.472135955 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 = 4.472135955 + -3 Combine like terms: 3 + -3 = 0 0 + X = 4.472135955 + -3 X = 4.472135955 + -3 Combine like terms: 4.472135955 + -3 = 1.472135955 X = 1.472135955 Simplifying X = 1.472135955Subproblem 2
X + 3 = -4.472135955 Simplifying X + 3 = -4.472135955 Reorder the terms: 3 + X = -4.472135955 Solving 3 + X = -4.472135955 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 = -4.472135955 + -3 Combine like terms: 3 + -3 = 0 0 + X = -4.472135955 + -3 X = -4.472135955 + -3 Combine like terms: -4.472135955 + -3 = -7.472135955 X = -7.472135955 Simplifying X = -7.472135955Solution
The solution to the problem is based on the solutions from the subproblems. X = {1.472135955, -7.472135955}
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