x^2+36x-9=0

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Solution for x^2+36x-9=0 equation:


Simplifying
x2 + 36x + -9 = 0

Reorder the terms:
-9 + 36x + x2 = 0

Solving
-9 + 36x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '9' to each side of the equation.
-9 + 36x + 9 + x2 = 0 + 9

Reorder the terms:
-9 + 9 + 36x + x2 = 0 + 9

Combine like terms: -9 + 9 = 0
0 + 36x + x2 = 0 + 9
36x + x2 = 0 + 9

Combine like terms: 0 + 9 = 9
36x + x2 = 9

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 = 9 + 324

Reorder the terms:
324 + 36x + x2 = 9 + 324

Combine like terms: 9 + 324 = 333
324 + 36x + x2 = 333

Factor a perfect square on the left side:
(x + 18)(x + 18) = 333

Calculate the square root of the right side: 18.248287591

Break this problem into two subproblems by setting 
(x + 18) equal to 18.248287591 and -18.248287591.

Subproblem 1

x + 18 = 18.248287591 Simplifying x + 18 = 18.248287591 Reorder the terms: 18 + x = 18.248287591 Solving 18 + x = 18.248287591 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 = 18.248287591 + -18 Combine like terms: 18 + -18 = 0 0 + x = 18.248287591 + -18 x = 18.248287591 + -18 Combine like terms: 18.248287591 + -18 = 0.248287591 x = 0.248287591 Simplifying x = 0.248287591

Subproblem 2

x + 18 = -18.248287591 Simplifying x + 18 = -18.248287591 Reorder the terms: 18 + x = -18.248287591 Solving 18 + x = -18.248287591 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 = -18.248287591 + -18 Combine like terms: 18 + -18 = 0 0 + x = -18.248287591 + -18 x = -18.248287591 + -18 Combine like terms: -18.248287591 + -18 = -36.248287591 x = -36.248287591 Simplifying x = -36.248287591

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.248287591, -36.248287591}

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