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Simplifying 5x + 8 = x2 + 43 + 90 Reorder the terms: 8 + 5x = x2 + 43 + 90 Reorder the terms: 8 + 5x = 43 + 90 + x2 Combine like terms: 43 + 90 = 133 8 + 5x = 133 + x2 Solving 8 + 5x = 133 + x2 Solving for variable 'x'. Reorder the terms: 8 + -133 + 5x + -1x2 = 133 + x2 + -133 + -1x2 Combine like terms: 8 + -133 = -125 -125 + 5x + -1x2 = 133 + x2 + -133 + -1x2 Reorder the terms: -125 + 5x + -1x2 = 133 + -133 + x2 + -1x2 Combine like terms: 133 + -133 = 0 -125 + 5x + -1x2 = 0 + x2 + -1x2 -125 + 5x + -1x2 = x2 + -1x2 Combine like terms: x2 + -1x2 = 0 -125 + 5x + -1x2 = 0 Begin completing the square. Divide all terms by -1 the coefficient of the squared term: Divide each side by '-1'. 125 + -5x + x2 = 0 Move the constant term to the right: Add '-125' to each side of the equation. 125 + -5x + -125 + x2 = 0 + -125 Reorder the terms: 125 + -125 + -5x + x2 = 0 + -125 Combine like terms: 125 + -125 = 0 0 + -5x + x2 = 0 + -125 -5x + x2 = 0 + -125 Combine like terms: 0 + -125 = -125 -5x + x2 = -125 The x term is -5x. Take half its coefficient (-2.5). Square it (6.25) and add it to both sides. Add '6.25' to each side of the equation. -5x + 6.25 + x2 = -125 + 6.25 Reorder the terms: 6.25 + -5x + x2 = -125 + 6.25 Combine like terms: -125 + 6.25 = -118.75 6.25 + -5x + x2 = -118.75 Factor a perfect square on the left side: (x + -2.5)(x + -2.5) = -118.75 Can't calculate square root of the right side. The solution to this equation could not be determined.
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