0=-16t^2+80t+12389

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Solution for 0=-16t^2+80t+12389 equation:


Simplifying
0 = -16t2 + 80t + 12389

Reorder the terms:
0 = 12389 + 80t + -16t2

Solving
0 = 12389 + 80t + -16t2

Solving for variable 't'.

Combine like terms: 0 + -12389 = -12389
-12389 + -80t + 16t2 = 12389 + 80t + -16t2 + -12389 + -80t + 16t2

Reorder the terms:
-12389 + -80t + 16t2 = 12389 + -12389 + 80t + -80t + -16t2 + 16t2

Combine like terms: 12389 + -12389 = 0
-12389 + -80t + 16t2 = 0 + 80t + -80t + -16t2 + 16t2
-12389 + -80t + 16t2 = 80t + -80t + -16t2 + 16t2

Combine like terms: 80t + -80t = 0
-12389 + -80t + 16t2 = 0 + -16t2 + 16t2
-12389 + -80t + 16t2 = -16t2 + 16t2

Combine like terms: -16t2 + 16t2 = 0
-12389 + -80t + 16t2 = 0

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

Divide each side by '16'.
-774.3125 + -5t + t2 = 0

Move the constant term to the right:

Add '774.3125' to each side of the equation.
-774.3125 + -5t + 774.3125 + t2 = 0 + 774.3125

Reorder the terms:
-774.3125 + 774.3125 + -5t + t2 = 0 + 774.3125

Combine like terms: -774.3125 + 774.3125 = 0.0000
0.0000 + -5t + t2 = 0 + 774.3125
-5t + t2 = 0 + 774.3125

Combine like terms: 0 + 774.3125 = 774.3125
-5t + t2 = 774.3125

The t term is -5t.  Take half its coefficient (-2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
-5t + 6.25 + t2 = 774.3125 + 6.25

Reorder the terms:
6.25 + -5t + t2 = 774.3125 + 6.25

Combine like terms: 774.3125 + 6.25 = 780.5625
6.25 + -5t + t2 = 780.5625

Factor a perfect square on the left side:
(t + -2.5)(t + -2.5) = 780.5625

Calculate the square root of the right side: 27.938548638

Break this problem into two subproblems by setting 
(t + -2.5) equal to 27.938548638 and -27.938548638.

Subproblem 1

t + -2.5 = 27.938548638 Simplifying t + -2.5 = 27.938548638 Reorder the terms: -2.5 + t = 27.938548638 Solving -2.5 + t = 27.938548638 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + t = 27.938548638 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + t = 27.938548638 + 2.5 t = 27.938548638 + 2.5 Combine like terms: 27.938548638 + 2.5 = 30.438548638 t = 30.438548638 Simplifying t = 30.438548638

Subproblem 2

t + -2.5 = -27.938548638 Simplifying t + -2.5 = -27.938548638 Reorder the terms: -2.5 + t = -27.938548638 Solving -2.5 + t = -27.938548638 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + t = -27.938548638 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + t = -27.938548638 + 2.5 t = -27.938548638 + 2.5 Combine like terms: -27.938548638 + 2.5 = -25.438548638 t = -25.438548638 Simplifying t = -25.438548638

Solution

The solution to the problem is based on the solutions from the subproblems. t = {30.438548638, -25.438548638}

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