4x^2-13x+4=0

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Solution for 4x^2-13x+4=0 equation:


Simplifying
4x2 + -13x + 4 = 0

Reorder the terms:
4 + -13x + 4x2 = 0

Solving
4 + -13x + 4x2 = 0

Solving for variable 'x'.

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

Divide each side by '4'.
1 + -3.25x + x2 = 0

Move the constant term to the right:

Add '-1' to each side of the equation.
1 + -3.25x + -1 + x2 = 0 + -1

Reorder the terms:
1 + -1 + -3.25x + x2 = 0 + -1

Combine like terms: 1 + -1 = 0
0 + -3.25x + x2 = 0 + -1
-3.25x + x2 = 0 + -1

Combine like terms: 0 + -1 = -1
-3.25x + x2 = -1

The x term is -3.25x.  Take half its coefficient (-1.625).
Square it (2.640625) and add it to both sides.

Add '2.640625' to each side of the equation.
-3.25x + 2.640625 + x2 = -1 + 2.640625

Reorder the terms:
2.640625 + -3.25x + x2 = -1 + 2.640625

Combine like terms: -1 + 2.640625 = 1.640625
2.640625 + -3.25x + x2 = 1.640625

Factor a perfect square on the left side:
(x + -1.625)(x + -1.625) = 1.640625

Calculate the square root of the right side: 1.280868846

Break this problem into two subproblems by setting 
(x + -1.625) equal to 1.280868846 and -1.280868846.

Subproblem 1

x + -1.625 = 1.280868846 Simplifying x + -1.625 = 1.280868846 Reorder the terms: -1.625 + x = 1.280868846 Solving -1.625 + x = 1.280868846 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.625' to each side of the equation. -1.625 + 1.625 + x = 1.280868846 + 1.625 Combine like terms: -1.625 + 1.625 = 0.000 0.000 + x = 1.280868846 + 1.625 x = 1.280868846 + 1.625 Combine like terms: 1.280868846 + 1.625 = 2.905868846 x = 2.905868846 Simplifying x = 2.905868846

Subproblem 2

x + -1.625 = -1.280868846 Simplifying x + -1.625 = -1.280868846 Reorder the terms: -1.625 + x = -1.280868846 Solving -1.625 + x = -1.280868846 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.625' to each side of the equation. -1.625 + 1.625 + x = -1.280868846 + 1.625 Combine like terms: -1.625 + 1.625 = 0.000 0.000 + x = -1.280868846 + 1.625 x = -1.280868846 + 1.625 Combine like terms: -1.280868846 + 1.625 = 0.344131154 x = 0.344131154 Simplifying x = 0.344131154

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.905868846, 0.344131154}

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