8=-16t^2+40t+3

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Solution for 8=-16t^2+40t+3 equation:


Simplifying
8 = -16t2 + 40t + 3

Reorder the terms:
8 = 3 + 40t + -16t2

Solving
8 = 3 + 40t + -16t2

Solving for variable 't'.

Combine like terms: 8 + -3 = 5
5 + -40t + 16t2 = 3 + 40t + -16t2 + -3 + -40t + 16t2

Reorder the terms:
5 + -40t + 16t2 = 3 + -3 + 40t + -40t + -16t2 + 16t2

Combine like terms: 3 + -3 = 0
5 + -40t + 16t2 = 0 + 40t + -40t + -16t2 + 16t2
5 + -40t + 16t2 = 40t + -40t + -16t2 + 16t2

Combine like terms: 40t + -40t = 0
5 + -40t + 16t2 = 0 + -16t2 + 16t2
5 + -40t + 16t2 = -16t2 + 16t2

Combine like terms: -16t2 + 16t2 = 0
5 + -40t + 16t2 = 0

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

Divide each side by '16'.
0.3125 + -2.5t + t2 = 0

Move the constant term to the right:

Add '-0.3125' to each side of the equation.
0.3125 + -2.5t + -0.3125 + t2 = 0 + -0.3125

Reorder the terms:
0.3125 + -0.3125 + -2.5t + t2 = 0 + -0.3125

Combine like terms: 0.3125 + -0.3125 = 0.0000
0.0000 + -2.5t + t2 = 0 + -0.3125
-2.5t + t2 = 0 + -0.3125

Combine like terms: 0 + -0.3125 = -0.3125
-2.5t + t2 = -0.3125

The t term is -2.5t.  Take half its coefficient (-1.25).
Square it (1.5625) and add it to both sides.

Add '1.5625' to each side of the equation.
-2.5t + 1.5625 + t2 = -0.3125 + 1.5625

Reorder the terms:
1.5625 + -2.5t + t2 = -0.3125 + 1.5625

Combine like terms: -0.3125 + 1.5625 = 1.25
1.5625 + -2.5t + t2 = 1.25

Factor a perfect square on the left side:
(t + -1.25)(t + -1.25) = 1.25

Calculate the square root of the right side: 1.118033989

Break this problem into two subproblems by setting 
(t + -1.25) equal to 1.118033989 and -1.118033989.

Subproblem 1

t + -1.25 = 1.118033989 Simplifying t + -1.25 = 1.118033989 Reorder the terms: -1.25 + t = 1.118033989 Solving -1.25 + t = 1.118033989 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + t = 1.118033989 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + t = 1.118033989 + 1.25 t = 1.118033989 + 1.25 Combine like terms: 1.118033989 + 1.25 = 2.368033989 t = 2.368033989 Simplifying t = 2.368033989

Subproblem 2

t + -1.25 = -1.118033989 Simplifying t + -1.25 = -1.118033989 Reorder the terms: -1.25 + t = -1.118033989 Solving -1.25 + t = -1.118033989 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + t = -1.118033989 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + t = -1.118033989 + 1.25 t = -1.118033989 + 1.25 Combine like terms: -1.118033989 + 1.25 = 0.131966011 t = 0.131966011 Simplifying t = 0.131966011

Solution

The solution to the problem is based on the solutions from the subproblems. t = {2.368033989, 0.131966011}

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