4=-16t^2+129t

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Solution for 4=-16t^2+129t equation:


Simplifying
4 = -16t2 + 129t

Reorder the terms:
4 = 129t + -16t2

Solving
4 = 129t + -16t2

Solving for variable 't'.

Reorder the terms:
4 + -129t + 16t2 = 129t + -129t + -16t2 + 16t2

Combine like terms: 129t + -129t = 0
4 + -129t + 16t2 = 0 + -16t2 + 16t2
4 + -129t + 16t2 = -16t2 + 16t2

Combine like terms: -16t2 + 16t2 = 0
4 + -129t + 16t2 = 0

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

Divide each side by '16'.
0.25 + -8.0625t + t2 = 0

Move the constant term to the right:

Add '-0.25' to each side of the equation.
0.25 + -8.0625t + -0.25 + t2 = 0 + -0.25

Reorder the terms:
0.25 + -0.25 + -8.0625t + t2 = 0 + -0.25

Combine like terms: 0.25 + -0.25 = 0.00
0.00 + -8.0625t + t2 = 0 + -0.25
-8.0625t + t2 = 0 + -0.25

Combine like terms: 0 + -0.25 = -0.25
-8.0625t + t2 = -0.25

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 = -0.25 + 16.25097656

Reorder the terms:
16.25097656 + -8.0625t + t2 = -0.25 + 16.25097656

Combine like terms: -0.25 + 16.25097656 = 16.00097656
16.25097656 + -8.0625t + t2 = 16.00097656

Factor a perfect square on the left side:
(t + -4.03125)(t + -4.03125) = 16.00097656

Calculate the square root of the right side: 4.000122068

Break this problem into two subproblems by setting 
(t + -4.03125) equal to 4.000122068 and -4.000122068.

Subproblem 1

t + -4.03125 = 4.000122068 Simplifying t + -4.03125 = 4.000122068 Reorder the terms: -4.03125 + t = 4.000122068 Solving -4.03125 + t = 4.000122068 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 = 4.000122068 + 4.03125 Combine like terms: -4.03125 + 4.03125 = 0.00000 0.00000 + t = 4.000122068 + 4.03125 t = 4.000122068 + 4.03125 Combine like terms: 4.000122068 + 4.03125 = 8.031372068 t = 8.031372068 Simplifying t = 8.031372068

Subproblem 2

t + -4.03125 = -4.000122068 Simplifying t + -4.03125 = -4.000122068 Reorder the terms: -4.03125 + t = -4.000122068 Solving -4.03125 + t = -4.000122068 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 = -4.000122068 + 4.03125 Combine like terms: -4.03125 + 4.03125 = 0.00000 0.00000 + t = -4.000122068 + 4.03125 t = -4.000122068 + 4.03125 Combine like terms: -4.000122068 + 4.03125 = 0.031127932 t = 0.031127932 Simplifying t = 0.031127932

Solution

The solution to the problem is based on the solutions from the subproblems. t = {8.031372068, 0.031127932}

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