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Simplifying (x + 1) = x2 + -2x + 9 Reorder the terms: (1 + x) = x2 + -2x + 9 Remove parenthesis around (1 + x) 1 + x = x2 + -2x + 9 Reorder the terms: 1 + x = 9 + -2x + x2 Solving 1 + x = 9 + -2x + x2 Solving for variable 'x'. Reorder the terms: 1 + -9 + x + 2x + -1x2 = 9 + -2x + x2 + -9 + 2x + -1x2 Combine like terms: 1 + -9 = -8 -8 + x + 2x + -1x2 = 9 + -2x + x2 + -9 + 2x + -1x2 Combine like terms: x + 2x = 3x -8 + 3x + -1x2 = 9 + -2x + x2 + -9 + 2x + -1x2 Reorder the terms: -8 + 3x + -1x2 = 9 + -9 + -2x + 2x + x2 + -1x2 Combine like terms: 9 + -9 = 0 -8 + 3x + -1x2 = 0 + -2x + 2x + x2 + -1x2 -8 + 3x + -1x2 = -2x + 2x + x2 + -1x2 Combine like terms: -2x + 2x = 0 -8 + 3x + -1x2 = 0 + x2 + -1x2 -8 + 3x + -1x2 = x2 + -1x2 Combine like terms: x2 + -1x2 = 0 -8 + 3x + -1x2 = 0 Begin completing the square. Divide all terms by -1 the coefficient of the squared term: Divide each side by '-1'. 8 + -3x + x2 = 0 Move the constant term to the right: Add '-8' to each side of the equation. 8 + -3x + -8 + x2 = 0 + -8 Reorder the terms: 8 + -8 + -3x + x2 = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -3x + x2 = 0 + -8 -3x + x2 = 0 + -8 Combine like terms: 0 + -8 = -8 -3x + x2 = -8 The x term is -3x. Take half its coefficient (-1.5). Square it (2.25) and add it to both sides. Add '2.25' to each side of the equation. -3x + 2.25 + x2 = -8 + 2.25 Reorder the terms: 2.25 + -3x + x2 = -8 + 2.25 Combine like terms: -8 + 2.25 = -5.75 2.25 + -3x + x2 = -5.75 Factor a perfect square on the left side: (x + -1.5)(x + -1.5) = -5.75 Can't calculate square root of the right side. The solution to this equation could not be determined.
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