3.2x^2-8.5x+1.3=0

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Solution for 3.2x^2-8.5x+1.3=0 equation:


Simplifying
3.2x2 + -8.5x + 1.3 = 0

Reorder the terms:
1.3 + -8.5x + 3.2x2 = 0

Solving
1.3 + -8.5x + 3.2x2 = 0

Solving for variable 'x'.

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

Divide each side by '3.2'.
0.40625 + -2.65625x + x2 = 0

Move the constant term to the right:

Add '-0.40625' to each side of the equation.
0.40625 + -2.65625x + -0.40625 + x2 = 0 + -0.40625

Reorder the terms:
0.40625 + -0.40625 + -2.65625x + x2 = 0 + -0.40625

Combine like terms: 0.40625 + -0.40625 = 0.00000
0.00000 + -2.65625x + x2 = 0 + -0.40625
-2.65625x + x2 = 0 + -0.40625

Combine like terms: 0 + -0.40625 = -0.40625
-2.65625x + x2 = -0.40625

The x term is -2.65625x.  Take half its coefficient (-1.328125).
Square it (1.763916016) and add it to both sides.

Add '1.763916016' to each side of the equation.
-2.65625x + 1.763916016 + x2 = -0.40625 + 1.763916016

Reorder the terms:
1.763916016 + -2.65625x + x2 = -0.40625 + 1.763916016

Combine like terms: -0.40625 + 1.763916016 = 1.357666016
1.763916016 + -2.65625x + x2 = 1.357666016

Factor a perfect square on the left side:
(x + -1.328125)(x + -1.328125) = 1.357666016

Calculate the square root of the right side: 1.165189262

Break this problem into two subproblems by setting 
(x + -1.328125) equal to 1.165189262 and -1.165189262.

Subproblem 1

x + -1.328125 = 1.165189262 Simplifying x + -1.328125 = 1.165189262 Reorder the terms: -1.328125 + x = 1.165189262 Solving -1.328125 + x = 1.165189262 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.328125' to each side of the equation. -1.328125 + 1.328125 + x = 1.165189262 + 1.328125 Combine like terms: -1.328125 + 1.328125 = 0.000000 0.000000 + x = 1.165189262 + 1.328125 x = 1.165189262 + 1.328125 Combine like terms: 1.165189262 + 1.328125 = 2.493314262 x = 2.493314262 Simplifying x = 2.493314262

Subproblem 2

x + -1.328125 = -1.165189262 Simplifying x + -1.328125 = -1.165189262 Reorder the terms: -1.328125 + x = -1.165189262 Solving -1.328125 + x = -1.165189262 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.328125' to each side of the equation. -1.328125 + 1.328125 + x = -1.165189262 + 1.328125 Combine like terms: -1.328125 + 1.328125 = 0.000000 0.000000 + x = -1.165189262 + 1.328125 x = -1.165189262 + 1.328125 Combine like terms: -1.165189262 + 1.328125 = 0.162935738 x = 0.162935738 Simplifying x = 0.162935738

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.493314262, 0.162935738}

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