t=-16t^2+5t+15

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Solution for t=-16t^2+5t+15 equation:


Simplifying
t = -16t2 + 5t + 15

Reorder the terms:
t = 15 + 5t + -16t2

Solving
t = 15 + 5t + -16t2

Solving for variable 't'.

Reorder the terms:
-15 + t + -5t + 16t2 = 15 + 5t + -16t2 + -15 + -5t + 16t2

Combine like terms: t + -5t = -4t
-15 + -4t + 16t2 = 15 + 5t + -16t2 + -15 + -5t + 16t2

Reorder the terms:
-15 + -4t + 16t2 = 15 + -15 + 5t + -5t + -16t2 + 16t2

Combine like terms: 15 + -15 = 0
-15 + -4t + 16t2 = 0 + 5t + -5t + -16t2 + 16t2
-15 + -4t + 16t2 = 5t + -5t + -16t2 + 16t2

Combine like terms: 5t + -5t = 0
-15 + -4t + 16t2 = 0 + -16t2 + 16t2
-15 + -4t + 16t2 = -16t2 + 16t2

Combine like terms: -16t2 + 16t2 = 0
-15 + -4t + 16t2 = 0

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

Divide each side by '16'.
-0.9375 + -0.25t + t2 = 0

Move the constant term to the right:

Add '0.9375' to each side of the equation.
-0.9375 + -0.25t + 0.9375 + t2 = 0 + 0.9375

Reorder the terms:
-0.9375 + 0.9375 + -0.25t + t2 = 0 + 0.9375

Combine like terms: -0.9375 + 0.9375 = 0.0000
0.0000 + -0.25t + t2 = 0 + 0.9375
-0.25t + t2 = 0 + 0.9375

Combine like terms: 0 + 0.9375 = 0.9375
-0.25t + t2 = 0.9375

The t term is -0.25t.  Take half its coefficient (-0.125).
Square it (0.015625) and add it to both sides.

Add '0.015625' to each side of the equation.
-0.25t + 0.015625 + t2 = 0.9375 + 0.015625

Reorder the terms:
0.015625 + -0.25t + t2 = 0.9375 + 0.015625

Combine like terms: 0.9375 + 0.015625 = 0.953125
0.015625 + -0.25t + t2 = 0.953125

Factor a perfect square on the left side:
(t + -0.125)(t + -0.125) = 0.953125

Calculate the square root of the right side: 0.976281209

Break this problem into two subproblems by setting 
(t + -0.125) equal to 0.976281209 and -0.976281209.

Subproblem 1

t + -0.125 = 0.976281209 Simplifying t + -0.125 = 0.976281209 Reorder the terms: -0.125 + t = 0.976281209 Solving -0.125 + t = 0.976281209 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.125' to each side of the equation. -0.125 + 0.125 + t = 0.976281209 + 0.125 Combine like terms: -0.125 + 0.125 = 0.000 0.000 + t = 0.976281209 + 0.125 t = 0.976281209 + 0.125 Combine like terms: 0.976281209 + 0.125 = 1.101281209 t = 1.101281209 Simplifying t = 1.101281209

Subproblem 2

t + -0.125 = -0.976281209 Simplifying t + -0.125 = -0.976281209 Reorder the terms: -0.125 + t = -0.976281209 Solving -0.125 + t = -0.976281209 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.125' to each side of the equation. -0.125 + 0.125 + t = -0.976281209 + 0.125 Combine like terms: -0.125 + 0.125 = 0.000 0.000 + t = -0.976281209 + 0.125 t = -0.976281209 + 0.125 Combine like terms: -0.976281209 + 0.125 = -0.851281209 t = -0.851281209 Simplifying t = -0.851281209

Solution

The solution to the problem is based on the solutions from the subproblems. t = {1.101281209, -0.851281209}

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