-16t^2+80t+5=0

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Solution for -16t^2+80t+5=0 equation:


Simplifying
-16t2 + 80t + 5 = 0

Reorder the terms:
5 + 80t + -16t2 = 0

Solving
5 + 80t + -16t2 = 0

Solving for variable 't'.

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

Divide each side by '-16'.
-0.3125 + -5t + t2 = 0

Move the constant term to the right:

Add '0.3125' to each side of the equation.
-0.3125 + -5t + 0.3125 + t2 = 0 + 0.3125

Reorder the terms:
-0.3125 + 0.3125 + -5t + t2 = 0 + 0.3125

Combine like terms: -0.3125 + 0.3125 = 0.0000
0.0000 + -5t + t2 = 0 + 0.3125
-5t + t2 = 0 + 0.3125

Combine like terms: 0 + 0.3125 = 0.3125
-5t + t2 = 0.3125

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 = 0.3125 + 6.25

Reorder the terms:
6.25 + -5t + t2 = 0.3125 + 6.25

Combine like terms: 0.3125 + 6.25 = 6.5625
6.25 + -5t + t2 = 6.5625

Factor a perfect square on the left side:
(t + -2.5)(t + -2.5) = 6.5625

Calculate the square root of the right side: 2.561737691

Break this problem into two subproblems by setting 
(t + -2.5) equal to 2.561737691 and -2.561737691.

Subproblem 1

t + -2.5 = 2.561737691 Simplifying t + -2.5 = 2.561737691 Reorder the terms: -2.5 + t = 2.561737691 Solving -2.5 + t = 2.561737691 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 = 2.561737691 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + t = 2.561737691 + 2.5 t = 2.561737691 + 2.5 Combine like terms: 2.561737691 + 2.5 = 5.061737691 t = 5.061737691 Simplifying t = 5.061737691

Subproblem 2

t + -2.5 = -2.561737691 Simplifying t + -2.5 = -2.561737691 Reorder the terms: -2.5 + t = -2.561737691 Solving -2.5 + t = -2.561737691 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 = -2.561737691 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + t = -2.561737691 + 2.5 t = -2.561737691 + 2.5 Combine like terms: -2.561737691 + 2.5 = -0.061737691 t = -0.061737691 Simplifying t = -0.061737691

Solution

The solution to the problem is based on the solutions from the subproblems. t = {5.061737691, -0.061737691}

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