6x^2-5x-12=20

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Solution for 6x^2-5x-12=20 equation: 


Simplifying
6x2 + -5x + -12 = 20

Reorder the terms:
-12 + -5x + 6x2 = 20

Solving
-12 + -5x + 6x2 = 20

Solving for variable 'x'.

Reorder the terms:
-12 + -20 + -5x + 6x2 = 20 + -20

Combine like terms: -12 + -20 = -32
-32 + -5x + 6x2 = 20 + -20

Combine like terms: 20 + -20 = 0
-32 + -5x + 6x2 = 0

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

Divide each side by '6'.
-5.333333333 + -0.8333333333x + x2 = 0

Move the constant term to the right:

Add '5.333333333' to each side of the equation.
-5.333333333 + -0.8333333333x + 5.333333333 + x2 = 0 + 5.333333333

Reorder the terms:
-5.333333333 + 5.333333333 + -0.8333333333x + x2 = 0 + 5.333333333

Combine like terms: -5.333333333 + 5.333333333 = 0.000000000
0.000000000 + -0.8333333333x + x2 = 0 + 5.333333333
-0.8333333333x + x2 = 0 + 5.333333333

Combine like terms: 0 + 5.333333333 = 5.333333333
-0.8333333333x + x2 = 5.333333333

The x term is -0.8333333333x.  Take half its coefficient (-0.4166666667).
Square it (0.1736111111) and add it to both sides.

Add '0.1736111111' to each side of the equation.
-0.8333333333x + 0.1736111111 + x2 = 5.333333333 + 0.1736111111

Reorder the terms:
0.1736111111 + -0.8333333333x + x2 = 5.333333333 + 0.1736111111

Combine like terms: 5.333333333 + 0.1736111111 = 5.5069444441
0.1736111111 + -0.8333333333x + x2 = 5.5069444441

Factor a perfect square on the left side:
(x + -0.4166666667)(x + -0.4166666667) = 5.5069444441

Calculate the square root of the right side: 2.346687973

Break this problem into two subproblems by setting 
(x + -0.4166666667) equal to 2.346687973 and -2.346687973.


Subproblem 1
x + -0.4166666667 = 2.346687973

Simplifying
x + -0.4166666667 = 2.346687973

Reorder the terms:
-0.4166666667 + x = 2.346687973

Solving
-0.4166666667 + x = 2.346687973

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '0.4166666667' to each side of the equation.
-0.4166666667 + 0.4166666667 + x = 2.346687973 + 0.4166666667

Combine like terms: -0.4166666667 + 0.4166666667 = 0.0000000000
0.0000000000 + x = 2.346687973 + 0.4166666667
x = 2.346687973 + 0.4166666667

Combine like terms: 2.346687973 + 0.4166666667 = 2.7633546397
x = 2.7633546397

Simplifying
x = 2.7633546397


Subproblem 2
x + -0.4166666667 = -2.346687973

Simplifying
x + -0.4166666667 = -2.346687973

Reorder the terms:
-0.4166666667 + x = -2.346687973

Solving
-0.4166666667 + x = -2.346687973

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '0.4166666667' to each side of the equation.
-0.4166666667 + 0.4166666667 + x = -2.346687973 + 0.4166666667

Combine like terms: -0.4166666667 + 0.4166666667 = 0.0000000000
0.0000000000 + x = -2.346687973 + 0.4166666667
x = -2.346687973 + 0.4166666667

Combine like terms: -2.346687973 + 0.4166666667 = -1.9300213063
x = -1.9300213063

Simplifying
x = -1.9300213063


Solution
The solution to the problem is based on the solutions
from the subproblems.
x = {2.7633546397, -1.9300213063}

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