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Simplifying x2 + 4x + -79 = 0 Reorder the terms: -79 + 4x + x2 = 0 Solving -79 + 4x + x2 = 0 Solving for variable 'x'. Begin completing the square. Move the constant term to the right: Add '79' to each side of the equation. -79 + 4x + 79 + x2 = 0 + 79 Reorder the terms: -79 + 79 + 4x + x2 = 0 + 79 Combine like terms: -79 + 79 = 0 0 + 4x + x2 = 0 + 79 4x + x2 = 0 + 79 Combine like terms: 0 + 79 = 79 4x + x2 = 79 The x term is 4x. Take half its coefficient (2). Square it (4) and add it to both sides. Add '4' to each side of the equation. 4x + 4 + x2 = 79 + 4 Reorder the terms: 4 + 4x + x2 = 79 + 4 Combine like terms: 79 + 4 = 83 4 + 4x + x2 = 83 Factor a perfect square on the left side: (x + 2)(x + 2) = 83 Calculate the square root of the right side: 9.110433579 Break this problem into two subproblems by setting (x + 2) equal to 9.110433579 and -9.110433579.Subproblem 1
x + 2 = 9.110433579 Simplifying x + 2 = 9.110433579 Reorder the terms: 2 + x = 9.110433579 Solving 2 + x = 9.110433579 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = 9.110433579 + -2 Combine like terms: 2 + -2 = 0 0 + x = 9.110433579 + -2 x = 9.110433579 + -2 Combine like terms: 9.110433579 + -2 = 7.110433579 x = 7.110433579 Simplifying x = 7.110433579Subproblem 2
x + 2 = -9.110433579 Simplifying x + 2 = -9.110433579 Reorder the terms: 2 + x = -9.110433579 Solving 2 + x = -9.110433579 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = -9.110433579 + -2 Combine like terms: 2 + -2 = 0 0 + x = -9.110433579 + -2 x = -9.110433579 + -2 Combine like terms: -9.110433579 + -2 = -11.110433579 x = -11.110433579 Simplifying x = -11.110433579Solution
The solution to the problem is based on the solutions from the subproblems. x = {7.110433579, -11.110433579}
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