2x^2-12x+40=36

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Solution for 2x^2-12x+40=36 equation: 


Simplifying
2x2 + -12x + 40 = 36

Reorder the terms:
40 + -12x + 2x2 = 36

Solving
40 + -12x + 2x2 = 36

Solving for variable 'x'.

Reorder the terms:
40 + -36 + -12x + 2x2 = 36 + -36

Combine like terms: 40 + -36 = 4
4 + -12x + 2x2 = 36 + -36

Combine like terms: 36 + -36 = 0
4 + -12x + 2x2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(2 + -6x + x2) = 0

Ignore the factor 2.

Subproblem 1
Set the factor '(2 + -6x + x2)' equal to zero and attempt to solve:

Simplifying
2 + -6x + x2 = 0

Solving
2 + -6x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-2' to each side of the equation.
2 + -6x + -2 + x2 = 0 + -2

Reorder the terms:
2 + -2 + -6x + x2 = 0 + -2

Combine like terms: 2 + -2 = 0
0 + -6x + x2 = 0 + -2
-6x + x2 = 0 + -2

Combine like terms: 0 + -2 = -2
-6x + x2 = -2

The x term is -6x.  Take half its coefficient (-3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
-6x + 9 + x2 = -2 + 9

Reorder the terms:
9 + -6x + x2 = -2 + 9

Combine like terms: -2 + 9 = 7
9 + -6x + x2 = 7

Factor a perfect square on the left side:
(x + -3)(x + -3) = 7

Calculate the square root of the right side: 2.645751311

Break this problem into two subproblems by setting 
(x + -3) equal to 2.645751311 and -2.645751311.


Subproblem 1
x + -3 = 2.645751311

Simplifying
x + -3 = 2.645751311

Reorder the terms:
-3 + x = 2.645751311

Solving
-3 + x = 2.645751311

Solving for variable 'x'.

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

Add '3' to each side of the equation.
-3 + 3 + x = 2.645751311 + 3

Combine like terms: -3 + 3 = 0
0 + x = 2.645751311 + 3
x = 2.645751311 + 3

Combine like terms: 2.645751311 + 3 = 5.645751311
x = 5.645751311

Simplifying
x = 5.645751311


Subproblem 2
x + -3 = -2.645751311

Simplifying
x + -3 = -2.645751311

Reorder the terms:
-3 + x = -2.645751311

Solving
-3 + x = -2.645751311

Solving for variable 'x'.

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

Add '3' to each side of the equation.
-3 + 3 + x = -2.645751311 + 3

Combine like terms: -3 + 3 = 0
0 + x = -2.645751311 + 3
x = -2.645751311 + 3

Combine like terms: -2.645751311 + 3 = 0.354248689
x = 0.354248689

Simplifying
x = 0.354248689


Solution
The solution to the problem is based on the solutions
from the subproblems.
x = {5.645751311, 0.354248689}
Solution
x = {5.645751311, 0.354248689}

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