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Simplifying x2 + -20x + 220 = 0 Reorder the terms: 220 + -20x + x2 = 0 Solving 220 + -20x + x2 = 0 Solving for variable 'x'. Begin completing the square. Move the constant term to the right: Add '-220' to each side of the equation. 220 + -20x + -220 + x2 = 0 + -220 Reorder the terms: 220 + -220 + -20x + x2 = 0 + -220 Combine like terms: 220 + -220 = 0 0 + -20x + x2 = 0 + -220 -20x + x2 = 0 + -220 Combine like terms: 0 + -220 = -220 -20x + x2 = -220 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 = -220 + 100 Reorder the terms: 100 + -20x + x2 = -220 + 100 Combine like terms: -220 + 100 = -120 100 + -20x + x2 = -120 Factor a perfect square on the left side: (x + -10)(x + -10) = -120 Can't calculate square root of the right side. The solution to this equation could not be determined.
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