x^2+36x-324=0

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Solution for x^2+36x-324=0 equation:


Simplifying
x2 + 36x + -324 = 0

Reorder the terms:
-324 + 36x + x2 = 0

Solving
-324 + 36x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '324' to each side of the equation.
-324 + 36x + 324 + x2 = 0 + 324

Reorder the terms:
-324 + 324 + 36x + x2 = 0 + 324

Combine like terms: -324 + 324 = 0
0 + 36x + x2 = 0 + 324
36x + x2 = 0 + 324

Combine like terms: 0 + 324 = 324
36x + x2 = 324

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 = 324 + 324

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

Combine like terms: 324 + 324 = 648
324 + 36x + x2 = 648

Factor a perfect square on the left side:
(x + 18)(x + 18) = 648

Calculate the square root of the right side: 25.455844123

Break this problem into two subproblems by setting 
(x + 18) equal to 25.455844123 and -25.455844123.

Subproblem 1

x + 18 = 25.455844123 Simplifying x + 18 = 25.455844123 Reorder the terms: 18 + x = 25.455844123 Solving 18 + x = 25.455844123 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 = 25.455844123 + -18 Combine like terms: 18 + -18 = 0 0 + x = 25.455844123 + -18 x = 25.455844123 + -18 Combine like terms: 25.455844123 + -18 = 7.455844123 x = 7.455844123 Simplifying x = 7.455844123

Subproblem 2

x + 18 = -25.455844123 Simplifying x + 18 = -25.455844123 Reorder the terms: 18 + x = -25.455844123 Solving 18 + x = -25.455844123 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 = -25.455844123 + -18 Combine like terms: 18 + -18 = 0 0 + x = -25.455844123 + -18 x = -25.455844123 + -18 Combine like terms: -25.455844123 + -18 = -43.455844123 x = -43.455844123 Simplifying x = -43.455844123

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.455844123, -43.455844123}

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