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Simplifying x2 + -81x + 6561 = 0 Reorder the terms: 6561 + -81x + x2 = 0 Solving 6561 + -81x + x2 = 0 Solving for variable 'x'. Begin completing the square. Move the constant term to the right: Add '-6561' to each side of the equation. 6561 + -81x + -6561 + x2 = 0 + -6561 Reorder the terms: 6561 + -6561 + -81x + x2 = 0 + -6561 Combine like terms: 6561 + -6561 = 0 0 + -81x + x2 = 0 + -6561 -81x + x2 = 0 + -6561 Combine like terms: 0 + -6561 = -6561 -81x + x2 = -6561 The x term is -81x. Take half its coefficient (-40.5). Square it (1640.25) and add it to both sides. Add '1640.25' to each side of the equation. -81x + 1640.25 + x2 = -6561 + 1640.25 Reorder the terms: 1640.25 + -81x + x2 = -6561 + 1640.25 Combine like terms: -6561 + 1640.25 = -4920.75 1640.25 + -81x + x2 = -4920.75 Factor a perfect square on the left side: (x + -40.5)(x + -40.5) = -4920.75 Can't calculate square root of the right side. The solution to this equation could not be determined.
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