5=-16t^2+128t

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Solution for 5=-16t^2+128t equation:


Simplifying
5 = -16t2 + 128t

Reorder the terms:
5 = 128t + -16t2

Solving
5 = 128t + -16t2

Solving for variable 't'.

Reorder the terms:
5 + -128t + 16t2 = 128t + -128t + -16t2 + 16t2

Combine like terms: 128t + -128t = 0
5 + -128t + 16t2 = 0 + -16t2 + 16t2
5 + -128t + 16t2 = -16t2 + 16t2

Combine like terms: -16t2 + 16t2 = 0
5 + -128t + 16t2 = 0

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

Divide each side by '16'.
0.3125 + -8t + t2 = 0

Move the constant term to the right:

Add '-0.3125' to each side of the equation.
0.3125 + -8t + -0.3125 + t2 = 0 + -0.3125

Reorder the terms:
0.3125 + -0.3125 + -8t + t2 = 0 + -0.3125

Combine like terms: 0.3125 + -0.3125 = 0.0000
0.0000 + -8t + t2 = 0 + -0.3125
-8t + t2 = 0 + -0.3125

Combine like terms: 0 + -0.3125 = -0.3125
-8t + t2 = -0.3125

The t term is -8t.  Take half its coefficient (-4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
-8t + 16 + t2 = -0.3125 + 16

Reorder the terms:
16 + -8t + t2 = -0.3125 + 16

Combine like terms: -0.3125 + 16 = 15.6875
16 + -8t + t2 = 15.6875

Factor a perfect square on the left side:
(t + -4)(t + -4) = 15.6875

Calculate the square root of the right side: 3.960744879

Break this problem into two subproblems by setting 
(t + -4) equal to 3.960744879 and -3.960744879.

Subproblem 1

t + -4 = 3.960744879 Simplifying t + -4 = 3.960744879 Reorder the terms: -4 + t = 3.960744879 Solving -4 + t = 3.960744879 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + t = 3.960744879 + 4 Combine like terms: -4 + 4 = 0 0 + t = 3.960744879 + 4 t = 3.960744879 + 4 Combine like terms: 3.960744879 + 4 = 7.960744879 t = 7.960744879 Simplifying t = 7.960744879

Subproblem 2

t + -4 = -3.960744879 Simplifying t + -4 = -3.960744879 Reorder the terms: -4 + t = -3.960744879 Solving -4 + t = -3.960744879 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + t = -3.960744879 + 4 Combine like terms: -4 + 4 = 0 0 + t = -3.960744879 + 4 t = -3.960744879 + 4 Combine like terms: -3.960744879 + 4 = 0.039255121 t = 0.039255121 Simplifying t = 0.039255121

Solution

The solution to the problem is based on the solutions from the subproblems. t = {7.960744879, 0.039255121}

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