x^2+10x-168=0

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Solution for x^2+10x-168=0 equation:


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 = 8.892443989

Subproblem 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 = -18.892443989

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.892443989, -18.892443989}

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