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 = 16.50097656
16.25097656 + 8.0625t + t2 = 16.50097656

Factor a perfect square on the left side:
(t + 4.03125)(t + 4.03125) = 16.50097656

Calculate the square root of the right side: 4.062139407

Break this problem into two subproblems by setting 
(t + 4.03125) equal to 4.062139407 and -4.062139407.

Subproblem 1

t + 4.03125 = 4.062139407 Simplifying t + 4.03125 = 4.062139407 Reorder the terms: 4.03125 + t = 4.062139407 Solving 4.03125 + t = 4.062139407 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 = 4.062139407 + -4.03125 Combine like terms: 4.03125 + -4.03125 = 0.00000 0.00000 + t = 4.062139407 + -4.03125 t = 4.062139407 + -4.03125 Combine like terms: 4.062139407 + -4.03125 = 0.030889407 t = 0.030889407 Simplifying t = 0.030889407

Subproblem 2

t + 4.03125 = -4.062139407 Simplifying t + 4.03125 = -4.062139407 Reorder the terms: 4.03125 + t = -4.062139407 Solving 4.03125 + t = -4.062139407 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 = -4.062139407 + -4.03125 Combine like terms: 4.03125 + -4.03125 = 0.00000 0.00000 + t = -4.062139407 + -4.03125 t = -4.062139407 + -4.03125 Combine like terms: -4.062139407 + -4.03125 = -8.093389407 t = -8.093389407 Simplifying t = -8.093389407

Solution

The solution to the problem is based on the solutions from the subproblems. t = {0.030889407, -8.093389407}

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