10x^2-13x-6=0

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Solution for 10x^2-13x-6=0 equation:


Simplifying
10x2 + -13x + -6 = 0

Reorder the terms:
-6 + -13x + 10x2 = 0

Solving
-6 + -13x + 10x2 = 0

Solving for variable 'x'.

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

Divide each side by '10'.
-0.6 + -1.3x + x2 = 0

Move the constant term to the right:

Add '0.6' to each side of the equation.
-0.6 + -1.3x + 0.6 + x2 = 0 + 0.6

Reorder the terms:
-0.6 + 0.6 + -1.3x + x2 = 0 + 0.6

Combine like terms: -0.6 + 0.6 = 0.0
0.0 + -1.3x + x2 = 0 + 0.6
-1.3x + x2 = 0 + 0.6

Combine like terms: 0 + 0.6 = 0.6
-1.3x + x2 = 0.6

The x term is -1.3x.  Take half its coefficient (-0.65).
Square it (0.4225) and add it to both sides.

Add '0.4225' to each side of the equation.
-1.3x + 0.4225 + x2 = 0.6 + 0.4225

Reorder the terms:
0.4225 + -1.3x + x2 = 0.6 + 0.4225

Combine like terms: 0.6 + 0.4225 = 1.0225
0.4225 + -1.3x + x2 = 1.0225

Factor a perfect square on the left side:
(x + -0.65)(x + -0.65) = 1.0225

Calculate the square root of the right side: 1.011187421

Break this problem into two subproblems by setting 
(x + -0.65) equal to 1.011187421 and -1.011187421.

Subproblem 1

x + -0.65 = 1.011187421 Simplifying x + -0.65 = 1.011187421 Reorder the terms: -0.65 + x = 1.011187421 Solving -0.65 + x = 1.011187421 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.65' to each side of the equation. -0.65 + 0.65 + x = 1.011187421 + 0.65 Combine like terms: -0.65 + 0.65 = 0.00 0.00 + x = 1.011187421 + 0.65 x = 1.011187421 + 0.65 Combine like terms: 1.011187421 + 0.65 = 1.661187421 x = 1.661187421 Simplifying x = 1.661187421

Subproblem 2

x + -0.65 = -1.011187421 Simplifying x + -0.65 = -1.011187421 Reorder the terms: -0.65 + x = -1.011187421 Solving -0.65 + x = -1.011187421 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.65' to each side of the equation. -0.65 + 0.65 + x = -1.011187421 + 0.65 Combine like terms: -0.65 + 0.65 = 0.00 0.00 + x = -1.011187421 + 0.65 x = -1.011187421 + 0.65 Combine like terms: -1.011187421 + 0.65 = -0.361187421 x = -0.361187421 Simplifying x = -0.361187421

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.661187421, -0.361187421}

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