144x^2+72x-11=0

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Solution for 144x^2+72x-11=0 equation:


Simplifying
144x2 + 72x + -11 = 0

Reorder the terms:
-11 + 72x + 144x2 = 0

Solving
-11 + 72x + 144x2 = 0

Solving for variable 'x'.

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

Divide each side by '144'.
-0.07638888889 + 0.5x + x2 = 0

Move the constant term to the right:

Add '0.07638888889' to each side of the equation.
-0.07638888889 + 0.5x + 0.07638888889 + x2 = 0 + 0.07638888889

Reorder the terms:
-0.07638888889 + 0.07638888889 + 0.5x + x2 = 0 + 0.07638888889

Combine like terms: -0.07638888889 + 0.07638888889 = 0.00000000000
0.00000000000 + 0.5x + x2 = 0 + 0.07638888889
0.5x + x2 = 0 + 0.07638888889

Combine like terms: 0 + 0.07638888889 = 0.07638888889
0.5x + x2 = 0.07638888889

The x term is 0.5x.  Take half its coefficient (0.25).
Square it (0.0625) and add it to both sides.

Add '0.0625' to each side of the equation.
0.5x + 0.0625 + x2 = 0.07638888889 + 0.0625

Reorder the terms:
0.0625 + 0.5x + x2 = 0.07638888889 + 0.0625

Combine like terms: 0.07638888889 + 0.0625 = 0.13888888889
0.0625 + 0.5x + x2 = 0.13888888889

Factor a perfect square on the left side:
(x + 0.25)(x + 0.25) = 0.13888888889

Calculate the square root of the right side: 0.372677996

Break this problem into two subproblems by setting 
(x + 0.25) equal to 0.372677996 and -0.372677996.

Subproblem 1

x + 0.25 = 0.372677996 Simplifying x + 0.25 = 0.372677996 Reorder the terms: 0.25 + x = 0.372677996 Solving 0.25 + x = 0.372677996 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.25' to each side of the equation. 0.25 + -0.25 + x = 0.372677996 + -0.25 Combine like terms: 0.25 + -0.25 = 0.00 0.00 + x = 0.372677996 + -0.25 x = 0.372677996 + -0.25 Combine like terms: 0.372677996 + -0.25 = 0.122677996 x = 0.122677996 Simplifying x = 0.122677996

Subproblem 2

x + 0.25 = -0.372677996 Simplifying x + 0.25 = -0.372677996 Reorder the terms: 0.25 + x = -0.372677996 Solving 0.25 + x = -0.372677996 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.25' to each side of the equation. 0.25 + -0.25 + x = -0.372677996 + -0.25 Combine like terms: 0.25 + -0.25 = 0.00 0.00 + x = -0.372677996 + -0.25 x = -0.372677996 + -0.25 Combine like terms: -0.372677996 + -0.25 = -0.622677996 x = -0.622677996 Simplifying x = -0.622677996

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.122677996, -0.622677996}

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