5t^2-13t-2=0

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Solution for 5t^2-13t-2=0 equation:


Simplifying
5t2 + -13t + -2 = 0

Reorder the terms:
-2 + -13t + 5t2 = 0

Solving
-2 + -13t + 5t2 = 0

Solving for variable 't'.

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

Divide each side by '5'.
-0.4 + -2.6t + t2 = 0

Move the constant term to the right:

Add '0.4' to each side of the equation.
-0.4 + -2.6t + 0.4 + t2 = 0 + 0.4

Reorder the terms:
-0.4 + 0.4 + -2.6t + t2 = 0 + 0.4

Combine like terms: -0.4 + 0.4 = 0.0
0.0 + -2.6t + t2 = 0 + 0.4
-2.6t + t2 = 0 + 0.4

Combine like terms: 0 + 0.4 = 0.4
-2.6t + t2 = 0.4

The t term is -2.6t.  Take half its coefficient (-1.3).
Square it (1.69) and add it to both sides.

Add '1.69' to each side of the equation.
-2.6t + 1.69 + t2 = 0.4 + 1.69

Reorder the terms:
1.69 + -2.6t + t2 = 0.4 + 1.69

Combine like terms: 0.4 + 1.69 = 2.09
1.69 + -2.6t + t2 = 2.09

Factor a perfect square on the left side:
(t + -1.3)(t + -1.3) = 2.09

Calculate the square root of the right side: 1.445683229

Break this problem into two subproblems by setting 
(t + -1.3) equal to 1.445683229 and -1.445683229.

Subproblem 1

t + -1.3 = 1.445683229 Simplifying t + -1.3 = 1.445683229 Reorder the terms: -1.3 + t = 1.445683229 Solving -1.3 + t = 1.445683229 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.3' to each side of the equation. -1.3 + 1.3 + t = 1.445683229 + 1.3 Combine like terms: -1.3 + 1.3 = 0.0 0.0 + t = 1.445683229 + 1.3 t = 1.445683229 + 1.3 Combine like terms: 1.445683229 + 1.3 = 2.745683229 t = 2.745683229 Simplifying t = 2.745683229

Subproblem 2

t + -1.3 = -1.445683229 Simplifying t + -1.3 = -1.445683229 Reorder the terms: -1.3 + t = -1.445683229 Solving -1.3 + t = -1.445683229 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.3' to each side of the equation. -1.3 + 1.3 + t = -1.445683229 + 1.3 Combine like terms: -1.3 + 1.3 = 0.0 0.0 + t = -1.445683229 + 1.3 t = -1.445683229 + 1.3 Combine like terms: -1.445683229 + 1.3 = -0.145683229 t = -0.145683229 Simplifying t = -0.145683229

Solution

The solution to the problem is based on the solutions from the subproblems. t = {2.745683229, -0.145683229}

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