0=-16t^2+75t-87.890625

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Solution for 0=-16t^2+75t-87.890625 equation:


Simplifying
0 = -16t2 + 75t + -87.890625

Reorder the terms:
0 = -87.890625 + 75t + -16t2

Solving
0 = -87.890625 + 75t + -16t2

Solving for variable 't'.

Combine like terms: 0 + 87.890625 = 87.890625
87.890625 + -75t + 16t2 = -87.890625 + 75t + -16t2 + 87.890625 + -75t + 16t2

Reorder the terms:
87.890625 + -75t + 16t2 = -87.890625 + 87.890625 + 75t + -75t + -16t2 + 16t2

Combine like terms: -87.890625 + 87.890625 = 0.000000
87.890625 + -75t + 16t2 = 0.000000 + 75t + -75t + -16t2 + 16t2
87.890625 + -75t + 16t2 = 75t + -75t + -16t2 + 16t2

Combine like terms: 75t + -75t = 0
87.890625 + -75t + 16t2 = 0 + -16t2 + 16t2
87.890625 + -75t + 16t2 = -16t2 + 16t2

Combine like terms: -16t2 + 16t2 = 0
87.890625 + -75t + 16t2 = 0

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

Divide each side by '16'.
5.493164063 + -4.6875t + t2 = 0

Move the constant term to the right:

Add '-5.493164063' to each side of the equation.
5.493164063 + -4.6875t + -5.493164063 + t2 = 0 + -5.493164063

Reorder the terms:
5.493164063 + -5.493164063 + -4.6875t + t2 = 0 + -5.493164063

Combine like terms: 5.493164063 + -5.493164063 = 0.000000000
0.000000000 + -4.6875t + t2 = 0 + -5.493164063
-4.6875t + t2 = 0 + -5.493164063

Combine like terms: 0 + -5.493164063 = -5.493164063
-4.6875t + t2 = -5.493164063

The t term is -4.6875t.  Take half its coefficient (-2.34375).
Square it (5.493164063) and add it to both sides.

Add '5.493164063' to each side of the equation.
-4.6875t + 5.493164063 + t2 = -5.493164063 + 5.493164063

Reorder the terms:
5.493164063 + -4.6875t + t2 = -5.493164063 + 5.493164063

Combine like terms: -5.493164063 + 5.493164063 = 0.000000000
5.493164063 + -4.6875t + t2 = 0.000000000

Factor a perfect square on the left side:
(t + -2.34375)(t + -2.34375) = 0.000000000

Calculate the square root of the right side: 0.000000000

Break this problem into two subproblems by setting 
(t + -2.34375) equal to 0.000000000 and 0.000000000.

Subproblem 1

t + -2.34375 = 0.000000000 Simplifying t + -2.34375 = 0.000000000 Reorder the terms: -2.34375 + t = 0.000000000 Solving -2.34375 + t = 0.000000000 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '2.34375' to each side of the equation. -2.34375 + 2.34375 + t = 0.000000000 + 2.34375 Combine like terms: -2.34375 + 2.34375 = 0.00000 0.00000 + t = 0.000000000 + 2.34375 t = 0.000000000 + 2.34375 Combine like terms: 0.000000000 + 2.34375 = 2.34375 t = 2.34375 Simplifying t = 2.34375

Subproblem 2

t + -2.34375 = 0.000000000 Simplifying t + -2.34375 = 0.000000000 Reorder the terms: -2.34375 + t = 0.000000000 Solving -2.34375 + t = 0.000000000 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '2.34375' to each side of the equation. -2.34375 + 2.34375 + t = 0.000000000 + 2.34375 Combine like terms: -2.34375 + 2.34375 = 0.00000 0.00000 + t = 0.000000000 + 2.34375 t = 0.000000000 + 2.34375 Combine like terms: 0.000000000 + 2.34375 = 2.34375 t = 2.34375 Simplifying t = 2.34375

Solution

The solution to the problem is based on the solutions from the subproblems. t = {2.34375, 2.34375}

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