0=-16t^2-5t+100

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Solution for 0=-16t^2-5t+100 equation:


Simplifying
0 = -16t2 + -5t + 100

Reorder the terms:
0 = 100 + -5t + -16t2

Solving
0 = 100 + -5t + -16t2

Solving for variable 't'.

Combine like terms: 0 + -100 = -100
-100 + 5t + 16t2 = 100 + -5t + -16t2 + -100 + 5t + 16t2

Reorder the terms:
-100 + 5t + 16t2 = 100 + -100 + -5t + 5t + -16t2 + 16t2

Combine like terms: 100 + -100 = 0
-100 + 5t + 16t2 = 0 + -5t + 5t + -16t2 + 16t2
-100 + 5t + 16t2 = -5t + 5t + -16t2 + 16t2

Combine like terms: -5t + 5t = 0
-100 + 5t + 16t2 = 0 + -16t2 + 16t2
-100 + 5t + 16t2 = -16t2 + 16t2

Combine like terms: -16t2 + 16t2 = 0
-100 + 5t + 16t2 = 0

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

Divide each side by '16'.
-6.25 + 0.3125t + t2 = 0

Move the constant term to the right:

Add '6.25' to each side of the equation.
-6.25 + 0.3125t + 6.25 + t2 = 0 + 6.25

Reorder the terms:
-6.25 + 6.25 + 0.3125t + t2 = 0 + 6.25

Combine like terms: -6.25 + 6.25 = 0.00
0.00 + 0.3125t + t2 = 0 + 6.25
0.3125t + t2 = 0 + 6.25

Combine like terms: 0 + 6.25 = 6.25
0.3125t + t2 = 6.25

The t term is 0.3125t.  Take half its coefficient (0.15625).
Square it (0.0244140625) and add it to both sides.

Add '0.0244140625' to each side of the equation.
0.3125t + 0.0244140625 + t2 = 6.25 + 0.0244140625

Reorder the terms:
0.0244140625 + 0.3125t + t2 = 6.25 + 0.0244140625

Combine like terms: 6.25 + 0.0244140625 = 6.2744140625
0.0244140625 + 0.3125t + t2 = 6.2744140625

Factor a perfect square on the left side:
(t + 0.15625)(t + 0.15625) = 6.2744140625

Calculate the square root of the right side: 2.504878053

Break this problem into two subproblems by setting 
(t + 0.15625) equal to 2.504878053 and -2.504878053.

Subproblem 1

t + 0.15625 = 2.504878053 Simplifying t + 0.15625 = 2.504878053 Reorder the terms: 0.15625 + t = 2.504878053 Solving 0.15625 + t = 2.504878053 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.15625' to each side of the equation. 0.15625 + -0.15625 + t = 2.504878053 + -0.15625 Combine like terms: 0.15625 + -0.15625 = 0.00000 0.00000 + t = 2.504878053 + -0.15625 t = 2.504878053 + -0.15625 Combine like terms: 2.504878053 + -0.15625 = 2.348628053 t = 2.348628053 Simplifying t = 2.348628053

Subproblem 2

t + 0.15625 = -2.504878053 Simplifying t + 0.15625 = -2.504878053 Reorder the terms: 0.15625 + t = -2.504878053 Solving 0.15625 + t = -2.504878053 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.15625' to each side of the equation. 0.15625 + -0.15625 + t = -2.504878053 + -0.15625 Combine like terms: 0.15625 + -0.15625 = 0.00000 0.00000 + t = -2.504878053 + -0.15625 t = -2.504878053 + -0.15625 Combine like terms: -2.504878053 + -0.15625 = -2.661128053 t = -2.661128053 Simplifying t = -2.661128053

Solution

The solution to the problem is based on the solutions from the subproblems. t = {2.348628053, -2.661128053}

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