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Simplifying x2 + 10x + -168 = 0 Reorder the terms: -168 + 10x + x2 = 0 Solving -168 + 10x + x2 = 0 Solving for variable 'x'. Begin completing the square. Move the constant term to the right: Add '168' to each side of the equation. -168 + 10x + 168 + x2 = 0 + 168 Reorder the terms: -168 + 168 + 10x + x2 = 0 + 168 Combine like terms: -168 + 168 = 0 0 + 10x + x2 = 0 + 168 10x + x2 = 0 + 168 Combine like terms: 0 + 168 = 168 10x + x2 = 168 The x term is 10x. Take half its coefficient (5). Square it (25) and add it to both sides. Add '25' to each side of the equation. 10x + 25 + x2 = 168 + 25 Reorder the terms: 25 + 10x + x2 = 168 + 25 Combine like terms: 168 + 25 = 193 25 + 10x + x2 = 193 Factor a perfect square on the left side: (x + 5)(x + 5) = 193 Calculate the square root of the right side: 13.892443989 Break this problem into two subproblems by setting (x + 5) equal to 13.892443989 and -13.892443989.Subproblem 1
x + 5 = 13.892443989 Simplifying x + 5 = 13.892443989 Reorder the terms: 5 + x = 13.892443989 Solving 5 + x = 13.892443989 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + x = 13.892443989 + -5 Combine like terms: 5 + -5 = 0 0 + x = 13.892443989 + -5 x = 13.892443989 + -5 Combine like terms: 13.892443989 + -5 = 8.892443989 x = 8.892443989 Simplifying x = 8.892443989Subproblem 2
x + 5 = -13.892443989 Simplifying x + 5 = -13.892443989 Reorder the terms: 5 + x = -13.892443989 Solving 5 + x = -13.892443989 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + x = -13.892443989 + -5 Combine like terms: 5 + -5 = 0 0 + x = -13.892443989 + -5 x = -13.892443989 + -5 Combine like terms: -13.892443989 + -5 = -18.892443989 x = -18.892443989 Simplifying x = -18.892443989Solution
The solution to the problem is based on the solutions from the subproblems. x = {8.892443989, -18.892443989}
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