36x^2+x-117=0

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Solution for 36x^2+x-117=0 equation:


Simplifying
36x2 + x + -117 = 0

Reorder the terms:
-117 + x + 36x2 = 0

Solving
-117 + x + 36x2 = 0

Solving for variable 'x'.

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

Divide each side by '36'.
-3.25 + 0.02777777778x + x2 = 0

Move the constant term to the right:

Add '3.25' to each side of the equation.
-3.25 + 0.02777777778x + 3.25 + x2 = 0 + 3.25

Reorder the terms:
-3.25 + 3.25 + 0.02777777778x + x2 = 0 + 3.25

Combine like terms: -3.25 + 3.25 = 0.00
0.00 + 0.02777777778x + x2 = 0 + 3.25
0.02777777778x + x2 = 0 + 3.25

Combine like terms: 0 + 3.25 = 3.25
0.02777777778x + x2 = 3.25

The x term is x.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
0.02777777778x + 0.25 + x2 = 3.25 + 0.25

Reorder the terms:
0.25 + 0.02777777778x + x2 = 3.25 + 0.25

Combine like terms: 3.25 + 0.25 = 3.5
0.25 + 0.02777777778x + x2 = 3.5

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 3.5

Calculate the square root of the right side: 1.870828693

Break this problem into two subproblems by setting 
(x + 0.5) equal to 1.870828693 and -1.870828693.

Subproblem 1

x + 0.5 = 1.870828693 Simplifying x + 0.5 = 1.870828693 Reorder the terms: 0.5 + x = 1.870828693 Solving 0.5 + x = 1.870828693 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 1.870828693 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 1.870828693 + -0.5 x = 1.870828693 + -0.5 Combine like terms: 1.870828693 + -0.5 = 1.370828693 x = 1.370828693 Simplifying x = 1.370828693

Subproblem 2

x + 0.5 = -1.870828693 Simplifying x + 0.5 = -1.870828693 Reorder the terms: 0.5 + x = -1.870828693 Solving 0.5 + x = -1.870828693 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -1.870828693 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -1.870828693 + -0.5 x = -1.870828693 + -0.5 Combine like terms: -1.870828693 + -0.5 = -2.370828693 x = -2.370828693 Simplifying x = -2.370828693

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.370828693, -2.370828693}

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