10x^2-6x-13=0

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


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

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

Solving
-13 + -6x + 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'.
-1.3 + -0.6x + x2 = 0

Move the constant term to the right:

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

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

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

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

The x term is -0.6x.  Take half its coefficient (-0.3).
Square it (0.09) and add it to both sides.

Add '0.09' to each side of the equation.
-0.6x + 0.09 + x2 = 1.3 + 0.09

Reorder the terms:
0.09 + -0.6x + x2 = 1.3 + 0.09

Combine like terms: 1.3 + 0.09 = 1.39
0.09 + -0.6x + x2 = 1.39

Factor a perfect square on the left side:
(x + -0.3)(x + -0.3) = 1.39

Calculate the square root of the right side: 1.178982612

Break this problem into two subproblems by setting 
(x + -0.3) equal to 1.178982612 and -1.178982612.

Subproblem 1

x + -0.3 = 1.178982612 Simplifying x + -0.3 = 1.178982612 Reorder the terms: -0.3 + x = 1.178982612 Solving -0.3 + x = 1.178982612 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3' to each side of the equation. -0.3 + 0.3 + x = 1.178982612 + 0.3 Combine like terms: -0.3 + 0.3 = 0.0 0.0 + x = 1.178982612 + 0.3 x = 1.178982612 + 0.3 Combine like terms: 1.178982612 + 0.3 = 1.478982612 x = 1.478982612 Simplifying x = 1.478982612

Subproblem 2

x + -0.3 = -1.178982612 Simplifying x + -0.3 = -1.178982612 Reorder the terms: -0.3 + x = -1.178982612 Solving -0.3 + x = -1.178982612 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3' to each side of the equation. -0.3 + 0.3 + x = -1.178982612 + 0.3 Combine like terms: -0.3 + 0.3 = 0.0 0.0 + x = -1.178982612 + 0.3 x = -1.178982612 + 0.3 Combine like terms: -1.178982612 + 0.3 = -0.878982612 x = -0.878982612 Simplifying x = -0.878982612

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.478982612, -0.878982612}

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