22=6x*6x-5x-21

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Solution for 22=6x*6x-5x-21 equation:


Simplifying
22 = 6x * 6x + -5x + -21

Reorder the terms for easier multiplication:
22 = 6 * 6x * x + -5x + -21

Multiply 6 * 6
22 = 36x * x + -5x + -21

Multiply x * x
22 = 36x2 + -5x + -21

Reorder the terms:
22 = -21 + -5x + 36x2

Solving
22 = -21 + -5x + 36x2

Solving for variable 'x'.

Combine like terms: 22 + 21 = 43
43 + 5x + -36x2 = -21 + -5x + 36x2 + 21 + 5x + -36x2

Reorder the terms:
43 + 5x + -36x2 = -21 + 21 + -5x + 5x + 36x2 + -36x2

Combine like terms: -21 + 21 = 0
43 + 5x + -36x2 = 0 + -5x + 5x + 36x2 + -36x2
43 + 5x + -36x2 = -5x + 5x + 36x2 + -36x2

Combine like terms: -5x + 5x = 0
43 + 5x + -36x2 = 0 + 36x2 + -36x2
43 + 5x + -36x2 = 36x2 + -36x2

Combine like terms: 36x2 + -36x2 = 0
43 + 5x + -36x2 = 0

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

Divide each side by '-36'.
-1.194444444 + -0.1388888889x + x2 = 0

Move the constant term to the right:

Add '1.194444444' to each side of the equation.
-1.194444444 + -0.1388888889x + 1.194444444 + x2 = 0 + 1.194444444

Reorder the terms:
-1.194444444 + 1.194444444 + -0.1388888889x + x2 = 0 + 1.194444444

Combine like terms: -1.194444444 + 1.194444444 = 0.000000000
0.000000000 + -0.1388888889x + x2 = 0 + 1.194444444
-0.1388888889x + x2 = 0 + 1.194444444

Combine like terms: 0 + 1.194444444 = 1.194444444
-0.1388888889x + x2 = 1.194444444

The x term is -0.1388888889x.  Take half its coefficient (-0.06944444445).
Square it (0.004822530865) and add it to both sides.

Add '0.004822530865' to each side of the equation.
-0.1388888889x + 0.004822530865 + x2 = 1.194444444 + 0.004822530865

Reorder the terms:
0.004822530865 + -0.1388888889x + x2 = 1.194444444 + 0.004822530865

Combine like terms: 1.194444444 + 0.004822530865 = 1.199266974865
0.004822530865 + -0.1388888889x + x2 = 1.199266974865

Factor a perfect square on the left side:
(x + -0.06944444445)(x + -0.06944444445) = 1.199266974865

Calculate the square root of the right side: 1.095110485

Break this problem into two subproblems by setting 
(x + -0.06944444445) equal to 1.095110485 and -1.095110485.

Subproblem 1

x + -0.06944444445 = 1.095110485 Simplifying x + -0.06944444445 = 1.095110485 Reorder the terms: -0.06944444445 + x = 1.095110485 Solving -0.06944444445 + x = 1.095110485 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.06944444445' to each side of the equation. -0.06944444445 + 0.06944444445 + x = 1.095110485 + 0.06944444445 Combine like terms: -0.06944444445 + 0.06944444445 = 0.00000000000 0.00000000000 + x = 1.095110485 + 0.06944444445 x = 1.095110485 + 0.06944444445 Combine like terms: 1.095110485 + 0.06944444445 = 1.16455492945 x = 1.16455492945 Simplifying x = 1.16455492945

Subproblem 2

x + -0.06944444445 = -1.095110485 Simplifying x + -0.06944444445 = -1.095110485 Reorder the terms: -0.06944444445 + x = -1.095110485 Solving -0.06944444445 + x = -1.095110485 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.06944444445' to each side of the equation. -0.06944444445 + 0.06944444445 + x = -1.095110485 + 0.06944444445 Combine like terms: -0.06944444445 + 0.06944444445 = 0.00000000000 0.00000000000 + x = -1.095110485 + 0.06944444445 x = -1.095110485 + 0.06944444445 Combine like terms: -1.095110485 + 0.06944444445 = -1.02566604055 x = -1.02566604055 Simplifying x = -1.02566604055

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.16455492945, -1.02566604055}

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