36=x^2+36x

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Solution for 36=x^2+36x equation:


Simplifying
36 = x2 + 36x

Reorder the terms:
36 = 36x + x2

Solving
36 = 36x + x2

Solving for variable 'x'.

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

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

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

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

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

Move the constant term to the right:

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

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

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

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

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 = 36 + 324

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

Combine like terms: 36 + 324 = 360
324 + 36x + x2 = 360

Factor a perfect square on the left side:
(x + 18)(x + 18) = 360

Calculate the square root of the right side: 18.973665961

Break this problem into two subproblems by setting 
(x + 18) equal to 18.973665961 and -18.973665961.

Subproblem 1

x + 18 = 18.973665961 Simplifying x + 18 = 18.973665961 Reorder the terms: 18 + x = 18.973665961 Solving 18 + x = 18.973665961 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 = 18.973665961 + -18 Combine like terms: 18 + -18 = 0 0 + x = 18.973665961 + -18 x = 18.973665961 + -18 Combine like terms: 18.973665961 + -18 = 0.973665961 x = 0.973665961 Simplifying x = 0.973665961

Subproblem 2

x + 18 = -18.973665961 Simplifying x + 18 = -18.973665961 Reorder the terms: 18 + x = -18.973665961 Solving 18 + x = -18.973665961 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 = -18.973665961 + -18 Combine like terms: 18 + -18 = 0 0 + x = -18.973665961 + -18 x = -18.973665961 + -18 Combine like terms: -18.973665961 + -18 = -36.973665961 x = -36.973665961 Simplifying x = -36.973665961

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.973665961, -36.973665961}

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