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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 = -92 36 + 12x + x2 = -92 Factor a perfect square on the left side: (x + 6)(x + 6) = -92 Can't calculate square root of the right side. The solution to this equation could not be determined.
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