13x^2-11x+1=0

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Solution for 13x^2-11x+1=0 equation:


Simplifying
13x2 + -11x + 1 = 0

Reorder the terms:
1 + -11x + 13x2 = 0

Solving
1 + -11x + 13x2 = 0

Solving for variable 'x'.

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

Divide each side by '13'.
0.07692307692 + -0.8461538462x + x2 = 0

Move the constant term to the right:

Add '-0.07692307692' to each side of the equation.
0.07692307692 + -0.8461538462x + -0.07692307692 + x2 = 0 + -0.07692307692

Reorder the terms:
0.07692307692 + -0.07692307692 + -0.8461538462x + x2 = 0 + -0.07692307692

Combine like terms: 0.07692307692 + -0.07692307692 = 0.00000000000
0.00000000000 + -0.8461538462x + x2 = 0 + -0.07692307692
-0.8461538462x + x2 = 0 + -0.07692307692

Combine like terms: 0 + -0.07692307692 = -0.07692307692
-0.8461538462x + x2 = -0.07692307692

The x term is -0.8461538462x.  Take half its coefficient (-0.4230769231).
Square it (0.1789940829) and add it to both sides.

Add '0.1789940829' to each side of the equation.
-0.8461538462x + 0.1789940829 + x2 = -0.07692307692 + 0.1789940829

Reorder the terms:
0.1789940829 + -0.8461538462x + x2 = -0.07692307692 + 0.1789940829

Combine like terms: -0.07692307692 + 0.1789940829 = 0.10207100598
0.1789940829 + -0.8461538462x + x2 = 0.10207100598

Factor a perfect square on the left side:
(x + -0.4230769231)(x + -0.4230769231) = 0.10207100598

Calculate the square root of the right side: 0.319485533

Break this problem into two subproblems by setting 
(x + -0.4230769231) equal to 0.319485533 and -0.319485533.

Subproblem 1

x + -0.4230769231 = 0.319485533 Simplifying x + -0.4230769231 = 0.319485533 Reorder the terms: -0.4230769231 + x = 0.319485533 Solving -0.4230769231 + x = 0.319485533 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.4230769231' to each side of the equation. -0.4230769231 + 0.4230769231 + x = 0.319485533 + 0.4230769231 Combine like terms: -0.4230769231 + 0.4230769231 = 0.0000000000 0.0000000000 + x = 0.319485533 + 0.4230769231 x = 0.319485533 + 0.4230769231 Combine like terms: 0.319485533 + 0.4230769231 = 0.7425624561 x = 0.7425624561 Simplifying x = 0.7425624561

Subproblem 2

x + -0.4230769231 = -0.319485533 Simplifying x + -0.4230769231 = -0.319485533 Reorder the terms: -0.4230769231 + x = -0.319485533 Solving -0.4230769231 + x = -0.319485533 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.4230769231' to each side of the equation. -0.4230769231 + 0.4230769231 + x = -0.319485533 + 0.4230769231 Combine like terms: -0.4230769231 + 0.4230769231 = 0.0000000000 0.0000000000 + x = -0.319485533 + 0.4230769231 x = -0.319485533 + 0.4230769231 Combine like terms: -0.319485533 + 0.4230769231 = 0.1035913901 x = 0.1035913901 Simplifying x = 0.1035913901

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.7425624561, 0.1035913901}

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