13x^2-144x+9=0

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Solution for 13x^2-144x+9=0 equation:


Simplifying
13x2 + -144x + 9 = 0

Reorder the terms:
9 + -144x + 13x2 = 0

Solving
9 + -144x + 13x2 = 0

Solving for variable 'x'.

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

Divide each side by '13'.
0.6923076923 + -11.07692308x + x2 = 0

Move the constant term to the right:

Add '-0.6923076923' to each side of the equation.
0.6923076923 + -11.07692308x + -0.6923076923 + x2 = 0 + -0.6923076923

Reorder the terms:
0.6923076923 + -0.6923076923 + -11.07692308x + x2 = 0 + -0.6923076923

Combine like terms: 0.6923076923 + -0.6923076923 = 0.0000000000
0.0000000000 + -11.07692308x + x2 = 0 + -0.6923076923
-11.07692308x + x2 = 0 + -0.6923076923

Combine like terms: 0 + -0.6923076923 = -0.6923076923
-11.07692308x + x2 = -0.6923076923

The x term is -11.07692308x.  Take half its coefficient (-5.53846154).
Square it (30.67455623) and add it to both sides.

Add '30.67455623' to each side of the equation.
-11.07692308x + 30.67455623 + x2 = -0.6923076923 + 30.67455623

Reorder the terms:
30.67455623 + -11.07692308x + x2 = -0.6923076923 + 30.67455623

Combine like terms: -0.6923076923 + 30.67455623 = 29.9822485377
30.67455623 + -11.07692308x + x2 = 29.9822485377

Factor a perfect square on the left side:
(x + -5.53846154)(x + -5.53846154) = 29.9822485377

Calculate the square root of the right side: 5.475604856

Break this problem into two subproblems by setting 
(x + -5.53846154) equal to 5.475604856 and -5.475604856.

Subproblem 1

x + -5.53846154 = 5.475604856 Simplifying x + -5.53846154 = 5.475604856 Reorder the terms: -5.53846154 + x = 5.475604856 Solving -5.53846154 + x = 5.475604856 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5.53846154' to each side of the equation. -5.53846154 + 5.53846154 + x = 5.475604856 + 5.53846154 Combine like terms: -5.53846154 + 5.53846154 = 0.00000000 0.00000000 + x = 5.475604856 + 5.53846154 x = 5.475604856 + 5.53846154 Combine like terms: 5.475604856 + 5.53846154 = 11.014066396 x = 11.014066396 Simplifying x = 11.014066396

Subproblem 2

x + -5.53846154 = -5.475604856 Simplifying x + -5.53846154 = -5.475604856 Reorder the terms: -5.53846154 + x = -5.475604856 Solving -5.53846154 + x = -5.475604856 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5.53846154' to each side of the equation. -5.53846154 + 5.53846154 + x = -5.475604856 + 5.53846154 Combine like terms: -5.53846154 + 5.53846154 = 0.00000000 0.00000000 + x = -5.475604856 + 5.53846154 x = -5.475604856 + 5.53846154 Combine like terms: -5.475604856 + 5.53846154 = 0.062856684 x = 0.062856684 Simplifying x = 0.062856684

Solution

The solution to the problem is based on the solutions from the subproblems. x = {11.014066396, 0.062856684}

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