-16t^2+129t-5=0

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Solution for -16t^2+129t-5=0 equation:


Simplifying
-16t2 + 129t + -5 = 0

Reorder the terms:
-5 + 129t + -16t2 = 0

Solving
-5 + 129t + -16t2 = 0

Solving for variable 't'.

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

Divide each side by '-16'.
0.3125 + -8.0625t + t2 = 0

Move the constant term to the right:

Add '-0.3125' to each side of the equation.
0.3125 + -8.0625t + -0.3125 + t2 = 0 + -0.3125

Reorder the terms:
0.3125 + -0.3125 + -8.0625t + t2 = 0 + -0.3125

Combine like terms: 0.3125 + -0.3125 = 0.0000
0.0000 + -8.0625t + t2 = 0 + -0.3125
-8.0625t + t2 = 0 + -0.3125

Combine like terms: 0 + -0.3125 = -0.3125
-8.0625t + t2 = -0.3125

The t term is -8.0625t.  Take half its coefficient (-4.03125).
Square it (16.25097656) and add it to both sides.

Add '16.25097656' to each side of the equation.
-8.0625t + 16.25097656 + t2 = -0.3125 + 16.25097656

Reorder the terms:
16.25097656 + -8.0625t + t2 = -0.3125 + 16.25097656

Combine like terms: -0.3125 + 16.25097656 = 15.93847656
16.25097656 + -8.0625t + t2 = 15.93847656

Factor a perfect square on the left side:
(t + -4.03125)(t + -4.03125) = 15.93847656

Calculate the square root of the right side: 3.992302163

Break this problem into two subproblems by setting 
(t + -4.03125) equal to 3.992302163 and -3.992302163.

Subproblem 1

t + -4.03125 = 3.992302163 Simplifying t + -4.03125 = 3.992302163 Reorder the terms: -4.03125 + t = 3.992302163 Solving -4.03125 + t = 3.992302163 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '4.03125' to each side of the equation. -4.03125 + 4.03125 + t = 3.992302163 + 4.03125 Combine like terms: -4.03125 + 4.03125 = 0.00000 0.00000 + t = 3.992302163 + 4.03125 t = 3.992302163 + 4.03125 Combine like terms: 3.992302163 + 4.03125 = 8.023552163 t = 8.023552163 Simplifying t = 8.023552163

Subproblem 2

t + -4.03125 = -3.992302163 Simplifying t + -4.03125 = -3.992302163 Reorder the terms: -4.03125 + t = -3.992302163 Solving -4.03125 + t = -3.992302163 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '4.03125' to each side of the equation. -4.03125 + 4.03125 + t = -3.992302163 + 4.03125 Combine like terms: -4.03125 + 4.03125 = 0.00000 0.00000 + t = -3.992302163 + 4.03125 t = -3.992302163 + 4.03125 Combine like terms: -3.992302163 + 4.03125 = 0.038947837 t = 0.038947837 Simplifying t = 0.038947837

Solution

The solution to the problem is based on the solutions from the subproblems. t = {8.023552163, 0.038947837}

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