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Simplifying 80000 = -1x2 + 1400x + -1320000 Reorder the terms: 80000 = -1320000 + 1400x + -1x2 Solving 80000 = -1320000 + 1400x + -1x2 Solving for variable 'x'. Combine like terms: 80000 + 1320000 = 1400000 1400000 + -1400x + x2 = -1320000 + 1400x + -1x2 + 1320000 + -1400x + x2 Reorder the terms: 1400000 + -1400x + x2 = -1320000 + 1320000 + 1400x + -1400x + -1x2 + x2 Combine like terms: -1320000 + 1320000 = 0 1400000 + -1400x + x2 = 0 + 1400x + -1400x + -1x2 + x2 1400000 + -1400x + x2 = 1400x + -1400x + -1x2 + x2 Combine like terms: 1400x + -1400x = 0 1400000 + -1400x + x2 = 0 + -1x2 + x2 1400000 + -1400x + x2 = -1x2 + x2 Combine like terms: -1x2 + x2 = 0 1400000 + -1400x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '-1400000' to each side of the equation. 1400000 + -1400x + -1400000 + x2 = 0 + -1400000 Reorder the terms: 1400000 + -1400000 + -1400x + x2 = 0 + -1400000 Combine like terms: 1400000 + -1400000 = 0 0 + -1400x + x2 = 0 + -1400000 -1400x + x2 = 0 + -1400000 Combine like terms: 0 + -1400000 = -1400000 -1400x + x2 = -1400000 The x term is -1400x. Take half its coefficient (-700). Square it (490000) and add it to both sides. Add '490000' to each side of the equation. -1400x + 490000 + x2 = -1400000 + 490000 Reorder the terms: 490000 + -1400x + x2 = -1400000 + 490000 Combine like terms: -1400000 + 490000 = -910000 490000 + -1400x + x2 = -910000 Factor a perfect square on the left side: (x + -700)(x + -700) = -910000 Can't calculate square root of the right side. The solution to this equation could not be determined.
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