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

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


Simplifying
t = -16t2 + 15t + 5

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

Solving
t = 5 + 15t + -16t2

Solving for variable 't'.

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

Combine like terms: t + -15t = -14t
-5 + -14t + 16t2 = 5 + 15t + -16t2 + -5 + -15t + 16t2

Reorder the terms:
-5 + -14t + 16t2 = 5 + -5 + 15t + -15t + -16t2 + 16t2

Combine like terms: 5 + -5 = 0
-5 + -14t + 16t2 = 0 + 15t + -15t + -16t2 + 16t2
-5 + -14t + 16t2 = 15t + -15t + -16t2 + 16t2

Combine like terms: 15t + -15t = 0
-5 + -14t + 16t2 = 0 + -16t2 + 16t2
-5 + -14t + 16t2 = -16t2 + 16t2

Combine like terms: -16t2 + 16t2 = 0
-5 + -14t + 16t2 = 0

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

Divide each side by '16'.
-0.3125 + -0.875t + t2 = 0

Move the constant term to the right:

Add '0.3125' to each side of the equation.
-0.3125 + -0.875t + 0.3125 + t2 = 0 + 0.3125

Reorder the terms:
-0.3125 + 0.3125 + -0.875t + t2 = 0 + 0.3125

Combine like terms: -0.3125 + 0.3125 = 0.0000
0.0000 + -0.875t + t2 = 0 + 0.3125
-0.875t + t2 = 0 + 0.3125

Combine like terms: 0 + 0.3125 = 0.3125
-0.875t + t2 = 0.3125

The t term is -0.875t.  Take half its coefficient (-0.4375).
Square it (0.19140625) and add it to both sides.

Add '0.19140625' to each side of the equation.
-0.875t + 0.19140625 + t2 = 0.3125 + 0.19140625

Reorder the terms:
0.19140625 + -0.875t + t2 = 0.3125 + 0.19140625

Combine like terms: 0.3125 + 0.19140625 = 0.50390625
0.19140625 + -0.875t + t2 = 0.50390625

Factor a perfect square on the left side:
(t + -0.4375)(t + -0.4375) = 0.50390625

Calculate the square root of the right side: 0.709863543

Break this problem into two subproblems by setting 
(t + -0.4375) equal to 0.709863543 and -0.709863543.

Subproblem 1

t + -0.4375 = 0.709863543 Simplifying t + -0.4375 = 0.709863543 Reorder the terms: -0.4375 + t = 0.709863543 Solving -0.4375 + t = 0.709863543 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.4375' to each side of the equation. -0.4375 + 0.4375 + t = 0.709863543 + 0.4375 Combine like terms: -0.4375 + 0.4375 = 0.0000 0.0000 + t = 0.709863543 + 0.4375 t = 0.709863543 + 0.4375 Combine like terms: 0.709863543 + 0.4375 = 1.147363543 t = 1.147363543 Simplifying t = 1.147363543

Subproblem 2

t + -0.4375 = -0.709863543 Simplifying t + -0.4375 = -0.709863543 Reorder the terms: -0.4375 + t = -0.709863543 Solving -0.4375 + t = -0.709863543 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.4375' to each side of the equation. -0.4375 + 0.4375 + t = -0.709863543 + 0.4375 Combine like terms: -0.4375 + 0.4375 = 0.0000 0.0000 + t = -0.709863543 + 0.4375 t = -0.709863543 + 0.4375 Combine like terms: -0.709863543 + 0.4375 = -0.272363543 t = -0.272363543 Simplifying t = -0.272363543

Solution

The solution to the problem is based on the solutions from the subproblems. t = {1.147363543, -0.272363543}

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