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Simplifying x2 + 12x + -128 = 0 Reorder the terms: -128 + 12x + x2 = 0 Solving -128 + 12x + x2 = 0 Solving for variable 'x'. Begin completing the square. Move the constant term to the right: Add '128' to each side of the equation. -128 + 12x + 128 + x2 = 0 + 128 Reorder the terms: -128 + 128 + 12x + x2 = 0 + 128 Combine like terms: -128 + 128 = 0 0 + 12x + x2 = 0 + 128 12x + x2 = 0 + 128 Combine like terms: 0 + 128 = 128 12x + x2 = 128 The x term is 12x. Take half its coefficient (6). Square it (36) and add it to both sides. Add '36' to each side of the equation. 12x + 36 + x2 = 128 + 36 Reorder the terms: 36 + 12x + x2 = 128 + 36 Combine like terms: 128 + 36 = 164 36 + 12x + x2 = 164 Factor a perfect square on the left side: (x + 6)(x + 6) = 164 Calculate the square root of the right side: 12.806248475 Break this problem into two subproblems by setting (x + 6) equal to 12.806248475 and -12.806248475.Subproblem 1
x + 6 = 12.806248475 Simplifying x + 6 = 12.806248475 Reorder the terms: 6 + x = 12.806248475 Solving 6 + x = 12.806248475 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + x = 12.806248475 + -6 Combine like terms: 6 + -6 = 0 0 + x = 12.806248475 + -6 x = 12.806248475 + -6 Combine like terms: 12.806248475 + -6 = 6.806248475 x = 6.806248475 Simplifying x = 6.806248475Subproblem 2
x + 6 = -12.806248475 Simplifying x + 6 = -12.806248475 Reorder the terms: 6 + x = -12.806248475 Solving 6 + x = -12.806248475 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + x = -12.806248475 + -6 Combine like terms: 6 + -6 = 0 0 + x = -12.806248475 + -6 x = -12.806248475 + -6 Combine like terms: -12.806248475 + -6 = -18.806248475 x = -18.806248475 Simplifying x = -18.806248475Solution
The solution to the problem is based on the solutions from the subproblems. x = {6.806248475, -18.806248475}
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