0=16t^2+13t-13

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Solution for 0=16t^2+13t-13 equation:


Simplifying
0 = 16t2 + 13t + -13

Reorder the terms:
0 = -13 + 13t + 16t2

Solving
0 = -13 + 13t + 16t2

Solving for variable 't'.

Combine like terms: 0 + 13 = 13
13 + -13t + -16t2 = -13 + 13t + 16t2 + 13 + -13t + -16t2

Reorder the terms:
13 + -13t + -16t2 = -13 + 13 + 13t + -13t + 16t2 + -16t2

Combine like terms: -13 + 13 = 0
13 + -13t + -16t2 = 0 + 13t + -13t + 16t2 + -16t2
13 + -13t + -16t2 = 13t + -13t + 16t2 + -16t2

Combine like terms: 13t + -13t = 0
13 + -13t + -16t2 = 0 + 16t2 + -16t2
13 + -13t + -16t2 = 16t2 + -16t2

Combine like terms: 16t2 + -16t2 = 0
13 + -13t + -16t2 = 0

Begin completing the square.  Divide all terms by
-16 the coefficient of the squared term: 

Divide each side by '-16'.
-0.8125 + 0.8125t + t2 = 0

Move the constant term to the right:

Add '0.8125' to each side of the equation.
-0.8125 + 0.8125t + 0.8125 + t2 = 0 + 0.8125

Reorder the terms:
-0.8125 + 0.8125 + 0.8125t + t2 = 0 + 0.8125

Combine like terms: -0.8125 + 0.8125 = 0.0000
0.0000 + 0.8125t + t2 = 0 + 0.8125
0.8125t + t2 = 0 + 0.8125

Combine like terms: 0 + 0.8125 = 0.8125
0.8125t + t2 = 0.8125

The t term is 0.8125t.  Take half its coefficient (0.40625).
Square it (0.1650390625) and add it to both sides.

Add '0.1650390625' to each side of the equation.
0.8125t + 0.1650390625 + t2 = 0.8125 + 0.1650390625

Reorder the terms:
0.1650390625 + 0.8125t + t2 = 0.8125 + 0.1650390625

Combine like terms: 0.8125 + 0.1650390625 = 0.9775390625
0.1650390625 + 0.8125t + t2 = 0.9775390625

Factor a perfect square on the left side:
(t + 0.40625)(t + 0.40625) = 0.9775390625

Calculate the square root of the right side: 0.988705751

Break this problem into two subproblems by setting 
(t + 0.40625) equal to 0.988705751 and -0.988705751.

Subproblem 1

t + 0.40625 = 0.988705751 Simplifying t + 0.40625 = 0.988705751 Reorder the terms: 0.40625 + t = 0.988705751 Solving 0.40625 + t = 0.988705751 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.40625' to each side of the equation. 0.40625 + -0.40625 + t = 0.988705751 + -0.40625 Combine like terms: 0.40625 + -0.40625 = 0.00000 0.00000 + t = 0.988705751 + -0.40625 t = 0.988705751 + -0.40625 Combine like terms: 0.988705751 + -0.40625 = 0.582455751 t = 0.582455751 Simplifying t = 0.582455751

Subproblem 2

t + 0.40625 = -0.988705751 Simplifying t + 0.40625 = -0.988705751 Reorder the terms: 0.40625 + t = -0.988705751 Solving 0.40625 + t = -0.988705751 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.40625' to each side of the equation. 0.40625 + -0.40625 + t = -0.988705751 + -0.40625 Combine like terms: 0.40625 + -0.40625 = 0.00000 0.00000 + t = -0.988705751 + -0.40625 t = -0.988705751 + -0.40625 Combine like terms: -0.988705751 + -0.40625 = -1.394955751 t = -1.394955751 Simplifying t = -1.394955751

Solution

The solution to the problem is based on the solutions from the subproblems. t = {0.582455751, -1.394955751}

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