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Simplifying -2 = x2 + -9x + 23 Reorder the terms: -2 = 23 + -9x + x2 Solving -2 = 23 + -9x + x2 Solving for variable 'x'. Combine like terms: -2 + -23 = -25 -25 + 9x + -1x2 = 23 + -9x + x2 + -23 + 9x + -1x2 Reorder the terms: -25 + 9x + -1x2 = 23 + -23 + -9x + 9x + x2 + -1x2 Combine like terms: 23 + -23 = 0 -25 + 9x + -1x2 = 0 + -9x + 9x + x2 + -1x2 -25 + 9x + -1x2 = -9x + 9x + x2 + -1x2 Combine like terms: -9x + 9x = 0 -25 + 9x + -1x2 = 0 + x2 + -1x2 -25 + 9x + -1x2 = x2 + -1x2 Combine like terms: x2 + -1x2 = 0 -25 + 9x + -1x2 = 0 Begin completing the square. Divide all terms by -1 the coefficient of the squared term: Divide each side by '-1'. 25 + -9x + x2 = 0 Move the constant term to the right: Add '-25' to each side of the equation. 25 + -9x + -25 + x2 = 0 + -25 Reorder the terms: 25 + -25 + -9x + x2 = 0 + -25 Combine like terms: 25 + -25 = 0 0 + -9x + x2 = 0 + -25 -9x + x2 = 0 + -25 Combine like terms: 0 + -25 = -25 -9x + x2 = -25 The x term is -9x. Take half its coefficient (-4.5). Square it (20.25) and add it to both sides. Add '20.25' to each side of the equation. -9x + 20.25 + x2 = -25 + 20.25 Reorder the terms: 20.25 + -9x + x2 = -25 + 20.25 Combine like terms: -25 + 20.25 = -4.75 20.25 + -9x + x2 = -4.75 Factor a perfect square on the left side: (x + -4.5)(x + -4.5) = -4.75 Can't calculate square root of the right side. The solution to this equation could not be determined.
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