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Simplifying x + -1x2 = 640 Solving x + -1x2 = 640 Solving for variable 'x'. Reorder the terms: -640 + x + -1x2 = 640 + -640 Combine like terms: 640 + -640 = 0 -640 + x + -1x2 = 0 Begin completing the square. Divide all terms by -1 the coefficient of the squared term: Divide each side by '-1'. 640 + -1x + x2 = 0 Move the constant term to the right: Add '-640' to each side of the equation. 640 + -1x + -640 + x2 = 0 + -640 Reorder the terms: 640 + -640 + -1x + x2 = 0 + -640 Combine like terms: 640 + -640 = 0 0 + -1x + x2 = 0 + -640 -1x + x2 = 0 + -640 Combine like terms: 0 + -640 = -640 -1x + x2 = -640 The x term is x. Take half its coefficient (0.5). Square it (0.25) and add it to both sides. Add '0.25' to each side of the equation. -1x + 0.25 + x2 = -640 + 0.25 Reorder the terms: 0.25 + -1x + x2 = -640 + 0.25 Combine like terms: -640 + 0.25 = -639.75 0.25 + -1x + x2 = -639.75 Factor a perfect square on the left side: (x + 0.5)(x + 0.5) = -639.75 Can't calculate square root of the right side. The solution to this equation could not be determined.
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