x^2+.713x-.13=0

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Solution for x^2+.713x-.13=0 equation:


Simplifying
x2 + 0.713x + -0.13 = 0

Reorder the terms:
-0.13 + 0.713x + x2 = 0

Solving
-0.13 + 0.713x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '0.13' to each side of the equation.
-0.13 + 0.713x + 0.13 + x2 = 0 + 0.13

Reorder the terms:
-0.13 + 0.13 + 0.713x + x2 = 0 + 0.13

Combine like terms: -0.13 + 0.13 = 0.00
0.00 + 0.713x + x2 = 0 + 0.13
0.713x + x2 = 0 + 0.13

Combine like terms: 0 + 0.13 = 0.13
0.713x + x2 = 0.13

The x term is 0.713x.  Take half its coefficient (0.3565).
Square it (0.12709225) and add it to both sides.

Add '0.12709225' to each side of the equation.
0.713x + 0.12709225 + x2 = 0.13 + 0.12709225

Reorder the terms:
0.12709225 + 0.713x + x2 = 0.13 + 0.12709225

Combine like terms: 0.13 + 0.12709225 = 0.25709225
0.12709225 + 0.713x + x2 = 0.25709225

Factor a perfect square on the left side:
(x + 0.3565)(x + 0.3565) = 0.25709225

Calculate the square root of the right side: 0.507042651

Break this problem into two subproblems by setting 
(x + 0.3565) equal to 0.507042651 and -0.507042651.

Subproblem 1

x + 0.3565 = 0.507042651 Simplifying x + 0.3565 = 0.507042651 Reorder the terms: 0.3565 + x = 0.507042651 Solving 0.3565 + x = 0.507042651 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.3565' to each side of the equation. 0.3565 + -0.3565 + x = 0.507042651 + -0.3565 Combine like terms: 0.3565 + -0.3565 = 0.0000 0.0000 + x = 0.507042651 + -0.3565 x = 0.507042651 + -0.3565 Combine like terms: 0.507042651 + -0.3565 = 0.150542651 x = 0.150542651 Simplifying x = 0.150542651

Subproblem 2

x + 0.3565 = -0.507042651 Simplifying x + 0.3565 = -0.507042651 Reorder the terms: 0.3565 + x = -0.507042651 Solving 0.3565 + x = -0.507042651 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.3565' to each side of the equation. 0.3565 + -0.3565 + x = -0.507042651 + -0.3565 Combine like terms: 0.3565 + -0.3565 = 0.0000 0.0000 + x = -0.507042651 + -0.3565 x = -0.507042651 + -0.3565 Combine like terms: -0.507042651 + -0.3565 = -0.863542651 x = -0.863542651 Simplifying x = -0.863542651

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.150542651, -0.863542651}

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