0=x^2-36x-124

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Solution for 0=x^2-36x-124 equation:


Simplifying
0 = x2 + -36x + -124

Reorder the terms:
0 = -124 + -36x + x2

Solving
0 = -124 + -36x + x2

Solving for variable 'x'.

Combine like terms: 0 + 124 = 124
124 + 36x + -1x2 = -124 + -36x + x2 + 124 + 36x + -1x2

Reorder the terms:
124 + 36x + -1x2 = -124 + 124 + -36x + 36x + x2 + -1x2

Combine like terms: -124 + 124 = 0
124 + 36x + -1x2 = 0 + -36x + 36x + x2 + -1x2
124 + 36x + -1x2 = -36x + 36x + x2 + -1x2

Combine like terms: -36x + 36x = 0
124 + 36x + -1x2 = 0 + x2 + -1x2
124 + 36x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
124 + 36x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-124 + -36x + x2 = 0

Move the constant term to the right:

Add '124' to each side of the equation.
-124 + -36x + 124 + x2 = 0 + 124

Reorder the terms:
-124 + 124 + -36x + x2 = 0 + 124

Combine like terms: -124 + 124 = 0
0 + -36x + x2 = 0 + 124
-36x + x2 = 0 + 124

Combine like terms: 0 + 124 = 124
-36x + x2 = 124

The x term is -36x.  Take half its coefficient (-18).
Square it (324) and add it to both sides.

Add '324' to each side of the equation.
-36x + 324 + x2 = 124 + 324

Reorder the terms:
324 + -36x + x2 = 124 + 324

Combine like terms: 124 + 324 = 448
324 + -36x + x2 = 448

Factor a perfect square on the left side:
(x + -18)(x + -18) = 448

Calculate the square root of the right side: 21.166010489

Break this problem into two subproblems by setting 
(x + -18) equal to 21.166010489 and -21.166010489.

Subproblem 1

x + -18 = 21.166010489 Simplifying x + -18 = 21.166010489 Reorder the terms: -18 + x = 21.166010489 Solving -18 + x = 21.166010489 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '18' to each side of the equation. -18 + 18 + x = 21.166010489 + 18 Combine like terms: -18 + 18 = 0 0 + x = 21.166010489 + 18 x = 21.166010489 + 18 Combine like terms: 21.166010489 + 18 = 39.166010489 x = 39.166010489 Simplifying x = 39.166010489

Subproblem 2

x + -18 = -21.166010489 Simplifying x + -18 = -21.166010489 Reorder the terms: -18 + x = -21.166010489 Solving -18 + x = -21.166010489 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '18' to each side of the equation. -18 + 18 + x = -21.166010489 + 18 Combine like terms: -18 + 18 = 0 0 + x = -21.166010489 + 18 x = -21.166010489 + 18 Combine like terms: -21.166010489 + 18 = -3.166010489 x = -3.166010489 Simplifying x = -3.166010489

Solution

The solution to the problem is based on the solutions from the subproblems. x = {39.166010489, -3.166010489}

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