36=3x(x)-3x-2(x-2)

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Solution for 36=3x(x)-3x-2(x-2) equation:


Simplifying
36 = 3x(x) + -3x + -2(x + -2)

Multiply x * x
36 = 3x2 + -3x + -2(x + -2)

Reorder the terms:
36 = 3x2 + -3x + -2(-2 + x)
36 = 3x2 + -3x + (-2 * -2 + x * -2)
36 = 3x2 + -3x + (4 + -2x)

Reorder the terms:
36 = 4 + -3x + -2x + 3x2

Combine like terms: -3x + -2x = -5x
36 = 4 + -5x + 3x2

Solving
36 = 4 + -5x + 3x2

Solving for variable 'x'.

Combine like terms: 36 + -4 = 32
32 + 5x + -3x2 = 4 + -5x + 3x2 + -4 + 5x + -3x2

Reorder the terms:
32 + 5x + -3x2 = 4 + -4 + -5x + 5x + 3x2 + -3x2

Combine like terms: 4 + -4 = 0
32 + 5x + -3x2 = 0 + -5x + 5x + 3x2 + -3x2
32 + 5x + -3x2 = -5x + 5x + 3x2 + -3x2

Combine like terms: -5x + 5x = 0
32 + 5x + -3x2 = 0 + 3x2 + -3x2
32 + 5x + -3x2 = 3x2 + -3x2

Combine like terms: 3x2 + -3x2 = 0
32 + 5x + -3x2 = 0

Begin completing the square.  Divide all terms by
-3 the coefficient of the squared term: 

Divide each side by '-3'.
-10.66666667 + -1.666666667x + x2 = 0

Move the constant term to the right:

Add '10.66666667' to each side of the equation.
-10.66666667 + -1.666666667x + 10.66666667 + x2 = 0 + 10.66666667

Reorder the terms:
-10.66666667 + 10.66666667 + -1.666666667x + x2 = 0 + 10.66666667

Combine like terms: -10.66666667 + 10.66666667 = 0.00000000
0.00000000 + -1.666666667x + x2 = 0 + 10.66666667
-1.666666667x + x2 = 0 + 10.66666667

Combine like terms: 0 + 10.66666667 = 10.66666667
-1.666666667x + x2 = 10.66666667

The x term is -1.666666667x.  Take half its coefficient (-0.8333333335).
Square it (0.6944444447) and add it to both sides.

Add '0.6944444447' to each side of the equation.
-1.666666667x + 0.6944444447 + x2 = 10.66666667 + 0.6944444447

Reorder the terms:
0.6944444447 + -1.666666667x + x2 = 10.66666667 + 0.6944444447

Combine like terms: 10.66666667 + 0.6944444447 = 11.3611111147
0.6944444447 + -1.666666667x + x2 = 11.3611111147

Factor a perfect square on the left side:
(x + -0.8333333335)(x + -0.8333333335) = 11.3611111147

Calculate the square root of the right side: 3.370624737

Break this problem into two subproblems by setting 
(x + -0.8333333335) equal to 3.370624737 and -3.370624737.

Subproblem 1

x + -0.8333333335 = 3.370624737 Simplifying x + -0.8333333335 = 3.370624737 Reorder the terms: -0.8333333335 + x = 3.370624737 Solving -0.8333333335 + x = 3.370624737 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.8333333335' to each side of the equation. -0.8333333335 + 0.8333333335 + x = 3.370624737 + 0.8333333335 Combine like terms: -0.8333333335 + 0.8333333335 = 0.0000000000 0.0000000000 + x = 3.370624737 + 0.8333333335 x = 3.370624737 + 0.8333333335 Combine like terms: 3.370624737 + 0.8333333335 = 4.2039580705 x = 4.2039580705 Simplifying x = 4.2039580705

Subproblem 2

x + -0.8333333335 = -3.370624737 Simplifying x + -0.8333333335 = -3.370624737 Reorder the terms: -0.8333333335 + x = -3.370624737 Solving -0.8333333335 + x = -3.370624737 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.8333333335' to each side of the equation. -0.8333333335 + 0.8333333335 + x = -3.370624737 + 0.8333333335 Combine like terms: -0.8333333335 + 0.8333333335 = 0.0000000000 0.0000000000 + x = -3.370624737 + 0.8333333335 x = -3.370624737 + 0.8333333335 Combine like terms: -3.370624737 + 0.8333333335 = -2.5372914035 x = -2.5372914035 Simplifying x = -2.5372914035

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.2039580705, -2.5372914035}

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