8x^2-13x+2=0

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Solution for 8x^2-13x+2=0 equation:


Simplifying
8x2 + -13x + 2 = 0

Reorder the terms:
2 + -13x + 8x2 = 0

Solving
2 + -13x + 8x2 = 0

Solving for variable 'x'.

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

Divide each side by '8'.
0.25 + -1.625x + x2 = 0

Move the constant term to the right:

Add '-0.25' to each side of the equation.
0.25 + -1.625x + -0.25 + x2 = 0 + -0.25

Reorder the terms:
0.25 + -0.25 + -1.625x + x2 = 0 + -0.25

Combine like terms: 0.25 + -0.25 = 0.00
0.00 + -1.625x + x2 = 0 + -0.25
-1.625x + x2 = 0 + -0.25

Combine like terms: 0 + -0.25 = -0.25
-1.625x + x2 = -0.25

The x term is -1.625x.  Take half its coefficient (-0.8125).
Square it (0.66015625) and add it to both sides.

Add '0.66015625' to each side of the equation.
-1.625x + 0.66015625 + x2 = -0.25 + 0.66015625

Reorder the terms:
0.66015625 + -1.625x + x2 = -0.25 + 0.66015625

Combine like terms: -0.25 + 0.66015625 = 0.41015625
0.66015625 + -1.625x + x2 = 0.41015625

Factor a perfect square on the left side:
(x + -0.8125)(x + -0.8125) = 0.41015625

Calculate the square root of the right side: 0.640434423

Break this problem into two subproblems by setting 
(x + -0.8125) equal to 0.640434423 and -0.640434423.

Subproblem 1

x + -0.8125 = 0.640434423 Simplifying x + -0.8125 = 0.640434423 Reorder the terms: -0.8125 + x = 0.640434423 Solving -0.8125 + x = 0.640434423 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.8125' to each side of the equation. -0.8125 + 0.8125 + x = 0.640434423 + 0.8125 Combine like terms: -0.8125 + 0.8125 = 0.0000 0.0000 + x = 0.640434423 + 0.8125 x = 0.640434423 + 0.8125 Combine like terms: 0.640434423 + 0.8125 = 1.452934423 x = 1.452934423 Simplifying x = 1.452934423

Subproblem 2

x + -0.8125 = -0.640434423 Simplifying x + -0.8125 = -0.640434423 Reorder the terms: -0.8125 + x = -0.640434423 Solving -0.8125 + x = -0.640434423 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.8125' to each side of the equation. -0.8125 + 0.8125 + x = -0.640434423 + 0.8125 Combine like terms: -0.8125 + 0.8125 = 0.0000 0.0000 + x = -0.640434423 + 0.8125 x = -0.640434423 + 0.8125 Combine like terms: -0.640434423 + 0.8125 = 0.172065577 x = 0.172065577 Simplifying x = 0.172065577

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.452934423, 0.172065577}

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