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Simplifying (x) = 2x2 + -5x + 168 x = 2x2 + -5x + 168 Reorder the terms: x = 168 + -5x + 2x2 Solving x = 168 + -5x + 2x2 Solving for variable 'x'. Reorder the terms: -168 + x + 5x + -2x2 = 168 + -5x + 2x2 + -168 + 5x + -2x2 Combine like terms: x + 5x = 6x -168 + 6x + -2x2 = 168 + -5x + 2x2 + -168 + 5x + -2x2 Reorder the terms: -168 + 6x + -2x2 = 168 + -168 + -5x + 5x + 2x2 + -2x2 Combine like terms: 168 + -168 = 0 -168 + 6x + -2x2 = 0 + -5x + 5x + 2x2 + -2x2 -168 + 6x + -2x2 = -5x + 5x + 2x2 + -2x2 Combine like terms: -5x + 5x = 0 -168 + 6x + -2x2 = 0 + 2x2 + -2x2 -168 + 6x + -2x2 = 2x2 + -2x2 Combine like terms: 2x2 + -2x2 = 0 -168 + 6x + -2x2 = 0 Factor out the Greatest Common Factor (GCF), '2'. 2(-84 + 3x + -1x2) = 0 Ignore the factor 2.Subproblem 1
Set the factor '(-84 + 3x + -1x2)' equal to zero and attempt to solve: Simplifying -84 + 3x + -1x2 = 0 Solving -84 + 3x + -1x2 = 0 Begin completing the square. Divide all terms by -1 the coefficient of the squared term: Divide each side by '-1'. 84 + -3x + x2 = 0 Move the constant term to the right: Add '-84' to each side of the equation. 84 + -3x + -84 + x2 = 0 + -84 Reorder the terms: 84 + -84 + -3x + x2 = 0 + -84 Combine like terms: 84 + -84 = 0 0 + -3x + x2 = 0 + -84 -3x + x2 = 0 + -84 Combine like terms: 0 + -84 = -84 -3x + x2 = -84 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 = -84 + 2.25 Reorder the terms: 2.25 + -3x + x2 = -84 + 2.25 Combine like terms: -84 + 2.25 = -81.75 2.25 + -3x + x2 = -81.75 Factor a perfect square on the left side: (x + -1.5)(x + -1.5) = -81.75 Can't calculate square root of the right side. The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined. The solution to this equation could not be determined.
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