4a^2-13a+5=0

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Solution for 4a^2-13a+5=0 equation:


Simplifying
4a2 + -13a + 5 = 0

Reorder the terms:
5 + -13a + 4a2 = 0

Solving
5 + -13a + 4a2 = 0

Solving for variable 'a'.

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

Divide each side by '4'.
1.25 + -3.25a + a2 = 0

Move the constant term to the right:

Add '-1.25' to each side of the equation.
1.25 + -3.25a + -1.25 + a2 = 0 + -1.25

Reorder the terms:
1.25 + -1.25 + -3.25a + a2 = 0 + -1.25

Combine like terms: 1.25 + -1.25 = 0.00
0.00 + -3.25a + a2 = 0 + -1.25
-3.25a + a2 = 0 + -1.25

Combine like terms: 0 + -1.25 = -1.25
-3.25a + a2 = -1.25

The a term is -3.25a.  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.
-3.25a + 2.640625 + a2 = -1.25 + 2.640625

Reorder the terms:
2.640625 + -3.25a + a2 = -1.25 + 2.640625

Combine like terms: -1.25 + 2.640625 = 1.390625
2.640625 + -3.25a + a2 = 1.390625

Factor a perfect square on the left side:
(a + -1.625)(a + -1.625) = 1.390625

Calculate the square root of the right side: 1.179247642

Break this problem into two subproblems by setting 
(a + -1.625) equal to 1.179247642 and -1.179247642.

Subproblem 1

a + -1.625 = 1.179247642 Simplifying a + -1.625 = 1.179247642 Reorder the terms: -1.625 + a = 1.179247642 Solving -1.625 + a = 1.179247642 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '1.625' to each side of the equation. -1.625 + 1.625 + a = 1.179247642 + 1.625 Combine like terms: -1.625 + 1.625 = 0.000 0.000 + a = 1.179247642 + 1.625 a = 1.179247642 + 1.625 Combine like terms: 1.179247642 + 1.625 = 2.804247642 a = 2.804247642 Simplifying a = 2.804247642

Subproblem 2

a + -1.625 = -1.179247642 Simplifying a + -1.625 = -1.179247642 Reorder the terms: -1.625 + a = -1.179247642 Solving -1.625 + a = -1.179247642 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '1.625' to each side of the equation. -1.625 + 1.625 + a = -1.179247642 + 1.625 Combine like terms: -1.625 + 1.625 = 0.000 0.000 + a = -1.179247642 + 1.625 a = -1.179247642 + 1.625 Combine like terms: -1.179247642 + 1.625 = 0.445752358 a = 0.445752358 Simplifying a = 0.445752358

Solution

The solution to the problem is based on the solutions from the subproblems. a = {2.804247642, 0.445752358}

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