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Simplifying (x)(x + -1) = 168 Reorder the terms: x(-1 + x) = 168 (-1 * x + x * x) = 168 (-1x + x2) = 168 Solving -1x + x2 = 168 Solving for variable 'x'. Reorder the terms: -168 + -1x + x2 = 168 + -168 Combine like terms: 168 + -168 = 0 -168 + -1x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '168' to each side of the equation. -168 + -1x + 168 + x2 = 0 + 168 Reorder the terms: -168 + 168 + -1x + x2 = 0 + 168 Combine like terms: -168 + 168 = 0 0 + -1x + x2 = 0 + 168 -1x + x2 = 0 + 168 Combine like terms: 0 + 168 = 168 -1x + x2 = 168 The x term is -1x. 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 = 168 + 0.25 Reorder the terms: 0.25 + -1x + x2 = 168 + 0.25 Combine like terms: 168 + 0.25 = 168.25 0.25 + -1x + x2 = 168.25 Factor a perfect square on the left side: (x + -0.5)(x + -0.5) = 168.25 Calculate the square root of the right side: 12.971121771 Break this problem into two subproblems by setting (x + -0.5) equal to 12.971121771 and -12.971121771.Subproblem 1
x + -0.5 = 12.971121771 Simplifying x + -0.5 = 12.971121771 Reorder the terms: -0.5 + x = 12.971121771 Solving -0.5 + x = 12.971121771 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x = 12.971121771 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = 12.971121771 + 0.5 x = 12.971121771 + 0.5 Combine like terms: 12.971121771 + 0.5 = 13.471121771 x = 13.471121771 Simplifying x = 13.471121771Subproblem 2
x + -0.5 = -12.971121771 Simplifying x + -0.5 = -12.971121771 Reorder the terms: -0.5 + x = -12.971121771 Solving -0.5 + x = -12.971121771 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x = -12.971121771 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = -12.971121771 + 0.5 x = -12.971121771 + 0.5 Combine like terms: -12.971121771 + 0.5 = -12.471121771 x = -12.471121771 Simplifying x = -12.471121771Solution
The solution to the problem is based on the solutions from the subproblems. x = {13.471121771, -12.471121771}
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