3x^2-36x=26

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Solution for 3x^2-36x=26 equation:


Simplifying
3x2 + -36x = 26

Reorder the terms:
-36x + 3x2 = 26

Solving
-36x + 3x2 = 26

Solving for variable 'x'.

Reorder the terms:
-26 + -36x + 3x2 = 26 + -26

Combine like terms: 26 + -26 = 0
-26 + -36x + 3x2 = 0

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

Divide each side by '3'.
-8.666666667 + -12x + x2 = 0

Move the constant term to the right:

Add '8.666666667' to each side of the equation.
-8.666666667 + -12x + 8.666666667 + x2 = 0 + 8.666666667

Reorder the terms:
-8.666666667 + 8.666666667 + -12x + x2 = 0 + 8.666666667

Combine like terms: -8.666666667 + 8.666666667 = 0.000000000
0.000000000 + -12x + x2 = 0 + 8.666666667
-12x + x2 = 0 + 8.666666667

Combine like terms: 0 + 8.666666667 = 8.666666667
-12x + x2 = 8.666666667

The x term is -12x.  Take half its coefficient (-6).
Square it (36) and add it to both sides.

Add '36' to each side of the equation.
-12x + 36 + x2 = 8.666666667 + 36

Reorder the terms:
36 + -12x + x2 = 8.666666667 + 36

Combine like terms: 8.666666667 + 36 = 44.666666667
36 + -12x + x2 = 44.666666667

Factor a perfect square on the left side:
(x + -6)(x + -6) = 44.666666667

Calculate the square root of the right side: 6.683312552

Break this problem into two subproblems by setting 
(x + -6) equal to 6.683312552 and -6.683312552.

Subproblem 1

x + -6 = 6.683312552 Simplifying x + -6 = 6.683312552 Reorder the terms: -6 + x = 6.683312552 Solving -6 + x = 6.683312552 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + x = 6.683312552 + 6 Combine like terms: -6 + 6 = 0 0 + x = 6.683312552 + 6 x = 6.683312552 + 6 Combine like terms: 6.683312552 + 6 = 12.683312552 x = 12.683312552 Simplifying x = 12.683312552

Subproblem 2

x + -6 = -6.683312552 Simplifying x + -6 = -6.683312552 Reorder the terms: -6 + x = -6.683312552 Solving -6 + x = -6.683312552 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + x = -6.683312552 + 6 Combine like terms: -6 + 6 = 0 0 + x = -6.683312552 + 6 x = -6.683312552 + 6 Combine like terms: -6.683312552 + 6 = -0.683312552 x = -0.683312552 Simplifying x = -0.683312552

Solution

The solution to the problem is based on the solutions from the subproblems. x = {12.683312552, -0.683312552}

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