20(t)=-16t^2-32t+5

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Solution for 20(t)=-16t^2-32t+5 equation:


Simplifying
20(t) = -16t2 + -32t + 5

Reorder the terms:
20t = 5 + -32t + -16t2

Solving
20t = 5 + -32t + -16t2

Solving for variable 't'.

Reorder the terms:
-5 + 20t + 32t + 16t2 = 5 + -32t + -16t2 + -5 + 32t + 16t2

Combine like terms: 20t + 32t = 52t
-5 + 52t + 16t2 = 5 + -32t + -16t2 + -5 + 32t + 16t2

Reorder the terms:
-5 + 52t + 16t2 = 5 + -5 + -32t + 32t + -16t2 + 16t2

Combine like terms: 5 + -5 = 0
-5 + 52t + 16t2 = 0 + -32t + 32t + -16t2 + 16t2
-5 + 52t + 16t2 = -32t + 32t + -16t2 + 16t2

Combine like terms: -32t + 32t = 0
-5 + 52t + 16t2 = 0 + -16t2 + 16t2
-5 + 52t + 16t2 = -16t2 + 16t2

Combine like terms: -16t2 + 16t2 = 0
-5 + 52t + 16t2 = 0

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

Divide each side by '16'.
-0.3125 + 3.25t + t2 = 0

Move the constant term to the right:

Add '0.3125' to each side of the equation.
-0.3125 + 3.25t + 0.3125 + t2 = 0 + 0.3125

Reorder the terms:
-0.3125 + 0.3125 + 3.25t + t2 = 0 + 0.3125

Combine like terms: -0.3125 + 0.3125 = 0.0000
0.0000 + 3.25t + t2 = 0 + 0.3125
3.25t + t2 = 0 + 0.3125

Combine like terms: 0 + 0.3125 = 0.3125
3.25t + t2 = 0.3125

The t term is 3.25t.  Take half its coefficient (1.625).
Square it (2.640625) and add it to both sides.

Add '2.640625' to each side of the equation.
3.25t + 2.640625 + t2 = 0.3125 + 2.640625

Reorder the terms:
2.640625 + 3.25t + t2 = 0.3125 + 2.640625

Combine like terms: 0.3125 + 2.640625 = 2.953125
2.640625 + 3.25t + t2 = 2.953125

Factor a perfect square on the left side:
(t + 1.625)(t + 1.625) = 2.953125

Calculate the square root of the right side: 1.718465886

Break this problem into two subproblems by setting 
(t + 1.625) equal to 1.718465886 and -1.718465886.

Subproblem 1

t + 1.625 = 1.718465886 Simplifying t + 1.625 = 1.718465886 Reorder the terms: 1.625 + t = 1.718465886 Solving 1.625 + t = 1.718465886 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-1.625' to each side of the equation. 1.625 + -1.625 + t = 1.718465886 + -1.625 Combine like terms: 1.625 + -1.625 = 0.000 0.000 + t = 1.718465886 + -1.625 t = 1.718465886 + -1.625 Combine like terms: 1.718465886 + -1.625 = 0.093465886 t = 0.093465886 Simplifying t = 0.093465886

Subproblem 2

t + 1.625 = -1.718465886 Simplifying t + 1.625 = -1.718465886 Reorder the terms: 1.625 + t = -1.718465886 Solving 1.625 + t = -1.718465886 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-1.625' to each side of the equation. 1.625 + -1.625 + t = -1.718465886 + -1.625 Combine like terms: 1.625 + -1.625 = 0.000 0.000 + t = -1.718465886 + -1.625 t = -1.718465886 + -1.625 Combine like terms: -1.718465886 + -1.625 = -3.343465886 t = -3.343465886 Simplifying t = -3.343465886

Solution

The solution to the problem is based on the solutions from the subproblems. t = {0.093465886, -3.343465886}

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