8t^2-26t-5=0

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Solution for 8t^2-26t-5=0 equation:


Simplifying
8t2 + -26t + -5 = 0

Reorder the terms:
-5 + -26t + 8t2 = 0

Solving
-5 + -26t + 8t2 = 0

Solving for variable 't'.

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

Divide each side by '8'.
-0.625 + -3.25t + t2 = 0

Move the constant term to the right:

Add '0.625' to each side of the equation.
-0.625 + -3.25t + 0.625 + t2 = 0 + 0.625

Reorder the terms:
-0.625 + 0.625 + -3.25t + t2 = 0 + 0.625

Combine like terms: -0.625 + 0.625 = 0.000
0.000 + -3.25t + t2 = 0 + 0.625
-3.25t + t2 = 0 + 0.625

Combine like terms: 0 + 0.625 = 0.625
-3.25t + t2 = 0.625

The t term is -3.25t.  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.
-3.25t + 2.640625 + t2 = 0.625 + 2.640625

Reorder the terms:
2.640625 + -3.25t + t2 = 0.625 + 2.640625

Combine like terms: 0.625 + 2.640625 = 3.265625
2.640625 + -3.25t + t2 = 3.265625

Factor a perfect square on the left side:
(t + -1.625)(t + -1.625) = 3.265625

Calculate the square root of the right side: 1.807104037

Break this problem into two subproblems by setting 
(t + -1.625) equal to 1.807104037 and -1.807104037.

Subproblem 1

t + -1.625 = 1.807104037 Simplifying t + -1.625 = 1.807104037 Reorder the terms: -1.625 + t = 1.807104037 Solving -1.625 + t = 1.807104037 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.625' to each side of the equation. -1.625 + 1.625 + t = 1.807104037 + 1.625 Combine like terms: -1.625 + 1.625 = 0.000 0.000 + t = 1.807104037 + 1.625 t = 1.807104037 + 1.625 Combine like terms: 1.807104037 + 1.625 = 3.432104037 t = 3.432104037 Simplifying t = 3.432104037

Subproblem 2

t + -1.625 = -1.807104037 Simplifying t + -1.625 = -1.807104037 Reorder the terms: -1.625 + t = -1.807104037 Solving -1.625 + t = -1.807104037 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.625' to each side of the equation. -1.625 + 1.625 + t = -1.807104037 + 1.625 Combine like terms: -1.625 + 1.625 = 0.000 0.000 + t = -1.807104037 + 1.625 t = -1.807104037 + 1.625 Combine like terms: -1.807104037 + 1.625 = -0.182104037 t = -0.182104037 Simplifying t = -0.182104037

Solution

The solution to the problem is based on the solutions from the subproblems. t = {3.432104037, -0.182104037}

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