36x^2-x-12=0

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Solution for 36x^2-x-12=0 equation:


Simplifying
36x2 + -1x + -12 = 0

Reorder the terms:
-12 + -1x + 36x2 = 0

Solving
-12 + -1x + 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'.
-0.3333333333 + -0.02777777778x + x2 = 0

Move the constant term to the right:

Add '0.3333333333' to each side of the equation.
-0.3333333333 + -0.02777777778x + 0.3333333333 + x2 = 0 + 0.3333333333

Reorder the terms:
-0.3333333333 + 0.3333333333 + -0.02777777778x + x2 = 0 + 0.3333333333

Combine like terms: -0.3333333333 + 0.3333333333 = 0.0000000000
0.0000000000 + -0.02777777778x + x2 = 0 + 0.3333333333
-0.02777777778x + x2 = 0 + 0.3333333333

Combine like terms: 0 + 0.3333333333 = 0.3333333333
-0.02777777778x + x2 = 0.3333333333

The x term is -0.02777777778x.  Take half its coefficient (-0.01388888889).
Square it (0.0001929012346) and add it to both sides.

Add '0.0001929012346' to each side of the equation.
-0.02777777778x + 0.0001929012346 + x2 = 0.3333333333 + 0.0001929012346

Reorder the terms:
0.0001929012346 + -0.02777777778x + x2 = 0.3333333333 + 0.0001929012346

Combine like terms: 0.3333333333 + 0.0001929012346 = 0.3335262345346
0.0001929012346 + -0.02777777778x + x2 = 0.3335262345346

Factor a perfect square on the left side:
(x + -0.01388888889)(x + -0.01388888889) = 0.3335262345346

Calculate the square root of the right side: 0.577517302

Break this problem into two subproblems by setting 
(x + -0.01388888889) equal to 0.577517302 and -0.577517302.

Subproblem 1

x + -0.01388888889 = 0.577517302 Simplifying x + -0.01388888889 = 0.577517302 Reorder the terms: -0.01388888889 + x = 0.577517302 Solving -0.01388888889 + x = 0.577517302 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.01388888889' to each side of the equation. -0.01388888889 + 0.01388888889 + x = 0.577517302 + 0.01388888889 Combine like terms: -0.01388888889 + 0.01388888889 = 0.00000000000 0.00000000000 + x = 0.577517302 + 0.01388888889 x = 0.577517302 + 0.01388888889 Combine like terms: 0.577517302 + 0.01388888889 = 0.59140619089 x = 0.59140619089 Simplifying x = 0.59140619089

Subproblem 2

x + -0.01388888889 = -0.577517302 Simplifying x + -0.01388888889 = -0.577517302 Reorder the terms: -0.01388888889 + x = -0.577517302 Solving -0.01388888889 + x = -0.577517302 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.01388888889' to each side of the equation. -0.01388888889 + 0.01388888889 + x = -0.577517302 + 0.01388888889 Combine like terms: -0.01388888889 + 0.01388888889 = 0.00000000000 0.00000000000 + x = -0.577517302 + 0.01388888889 x = -0.577517302 + 0.01388888889 Combine like terms: -0.577517302 + 0.01388888889 = -0.56362841311 x = -0.56362841311 Simplifying x = -0.56362841311

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.59140619089, -0.56362841311}

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