x^2-36x-140=0

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Solution for x^2-36x-140=0 equation:


Simplifying
x2 + -36x + -140 = 0

Reorder the terms:
-140 + -36x + x2 = 0

Solving
-140 + -36x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '140' to each side of the equation.
-140 + -36x + 140 + x2 = 0 + 140

Reorder the terms:
-140 + 140 + -36x + x2 = 0 + 140

Combine like terms: -140 + 140 = 0
0 + -36x + x2 = 0 + 140
-36x + x2 = 0 + 140

Combine like terms: 0 + 140 = 140
-36x + x2 = 140

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 = 140 + 324

Reorder the terms:
324 + -36x + x2 = 140 + 324

Combine like terms: 140 + 324 = 464
324 + -36x + x2 = 464

Factor a perfect square on the left side:
(x + -18)(x + -18) = 464

Calculate the square root of the right side: 21.540659229

Break this problem into two subproblems by setting 
(x + -18) equal to 21.540659229 and -21.540659229.

Subproblem 1

x + -18 = 21.540659229 Simplifying x + -18 = 21.540659229 Reorder the terms: -18 + x = 21.540659229 Solving -18 + x = 21.540659229 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 = 21.540659229 + 18 Combine like terms: -18 + 18 = 0 0 + x = 21.540659229 + 18 x = 21.540659229 + 18 Combine like terms: 21.540659229 + 18 = 39.540659229 x = 39.540659229 Simplifying x = 39.540659229

Subproblem 2

x + -18 = -21.540659229 Simplifying x + -18 = -21.540659229 Reorder the terms: -18 + x = -21.540659229 Solving -18 + x = -21.540659229 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 = -21.540659229 + 18 Combine like terms: -18 + 18 = 0 0 + x = -21.540659229 + 18 x = -21.540659229 + 18 Combine like terms: -21.540659229 + 18 = -3.540659229 x = -3.540659229 Simplifying x = -3.540659229

Solution

The solution to the problem is based on the solutions from the subproblems. x = {39.540659229, -3.540659229}

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