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Simplifying x2 + -20x = -104 Reorder the terms: -20x + x2 = -104 Solving -20x + x2 = -104 Solving for variable 'x'. Reorder the terms: 104 + -20x + x2 = -104 + 104 Combine like terms: -104 + 104 = 0 104 + -20x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '-104' to each side of the equation. 104 + -20x + -104 + x2 = 0 + -104 Reorder the terms: 104 + -104 + -20x + x2 = 0 + -104 Combine like terms: 104 + -104 = 0 0 + -20x + x2 = 0 + -104 -20x + x2 = 0 + -104 Combine like terms: 0 + -104 = -104 -20x + x2 = -104 The x term is -20x. Take half its coefficient (-10). Square it (100) and add it to both sides. Add '100' to each side of the equation. -20x + 100 + x2 = -104 + 100 Reorder the terms: 100 + -20x + x2 = -104 + 100 Combine like terms: -104 + 100 = -4 100 + -20x + x2 = -4 Factor a perfect square on the left side: (x + -10)(x + -10) = -4 Can't calculate square root of the right side. The solution to this equation could not be determined.
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