72x^2-x-10=0

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Solution for 72x^2-x-10=0 equation:


Simplifying
72x2 + -1x + -10 = 0

Reorder the terms:
-10 + -1x + 72x2 = 0

Solving
-10 + -1x + 72x2 = 0

Solving for variable 'x'.

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

Divide each side by '72'.
-0.1388888889 + -0.01388888889x + x2 = 0

Move the constant term to the right:

Add '0.1388888889' to each side of the equation.
-0.1388888889 + -0.01388888889x + 0.1388888889 + x2 = 0 + 0.1388888889

Reorder the terms:
-0.1388888889 + 0.1388888889 + -0.01388888889x + x2 = 0 + 0.1388888889

Combine like terms: -0.1388888889 + 0.1388888889 = 0.0000000000
0.0000000000 + -0.01388888889x + x2 = 0 + 0.1388888889
-0.01388888889x + x2 = 0 + 0.1388888889

Combine like terms: 0 + 0.1388888889 = 0.1388888889
-0.01388888889x + x2 = 0.1388888889

The x term is -0.01388888889x.  Take half its coefficient (-0.006944444445).
Square it (0.00004822530865) and add it to both sides.

Add '0.00004822530865' to each side of the equation.
-0.01388888889x + 0.00004822530865 + x2 = 0.1388888889 + 0.00004822530865

Reorder the terms:
0.00004822530865 + -0.01388888889x + x2 = 0.1388888889 + 0.00004822530865

Combine like terms: 0.1388888889 + 0.00004822530865 = 0.13893711420865
0.00004822530865 + -0.01388888889x + x2 = 0.13893711420865

Factor a perfect square on the left side:
(x + -0.006944444445)(x + -0.006944444445) = 0.13893711420865

Calculate the square root of the right side: 0.372742692

Break this problem into two subproblems by setting 
(x + -0.006944444445) equal to 0.372742692 and -0.372742692.

Subproblem 1

x + -0.006944444445 = 0.372742692 Simplifying x + -0.006944444445 = 0.372742692 Reorder the terms: -0.006944444445 + x = 0.372742692 Solving -0.006944444445 + x = 0.372742692 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.006944444445' to each side of the equation. -0.006944444445 + 0.006944444445 + x = 0.372742692 + 0.006944444445 Combine like terms: -0.006944444445 + 0.006944444445 = 0.000000000000 0.000000000000 + x = 0.372742692 + 0.006944444445 x = 0.372742692 + 0.006944444445 Combine like terms: 0.372742692 + 0.006944444445 = 0.379687136445 x = 0.379687136445 Simplifying x = 0.379687136445

Subproblem 2

x + -0.006944444445 = -0.372742692 Simplifying x + -0.006944444445 = -0.372742692 Reorder the terms: -0.006944444445 + x = -0.372742692 Solving -0.006944444445 + x = -0.372742692 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.006944444445' to each side of the equation. -0.006944444445 + 0.006944444445 + x = -0.372742692 + 0.006944444445 Combine like terms: -0.006944444445 + 0.006944444445 = 0.000000000000 0.000000000000 + x = -0.372742692 + 0.006944444445 x = -0.372742692 + 0.006944444445 Combine like terms: -0.372742692 + 0.006944444445 = -0.365798247555 x = -0.365798247555 Simplifying x = -0.365798247555

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.379687136445, -0.365798247555}

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