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Simplifying x2 + -80x + 4000 = 0 Reorder the terms: 4000 + -80x + x2 = 0 Solving 4000 + -80x + x2 = 0 Solving for variable 'x'. Begin completing the square. Move the constant term to the right: Add '-4000' to each side of the equation. 4000 + -80x + -4000 + x2 = 0 + -4000 Reorder the terms: 4000 + -4000 + -80x + x2 = 0 + -4000 Combine like terms: 4000 + -4000 = 0 0 + -80x + x2 = 0 + -4000 -80x + x2 = 0 + -4000 Combine like terms: 0 + -4000 = -4000 -80x + x2 = -4000 The x term is -80x. Take half its coefficient (-40). Square it (1600) and add it to both sides. Add '1600' to each side of the equation. -80x + 1600 + x2 = -4000 + 1600 Reorder the terms: 1600 + -80x + x2 = -4000 + 1600 Combine like terms: -4000 + 1600 = -2400 1600 + -80x + x2 = -2400 Factor a perfect square on the left side: (x + -40)(x + -40) = -2400 Can't calculate square root of the right side. The solution to this equation could not be determined.
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