0=8+40.8t-16t^2

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Solution for 0=8+40.8t-16t^2 equation:


Simplifying
0 = 8 + 40.8t + -16t2

Solving
0 = 8 + 40.8t + -16t2

Solving for variable 't'.

Combine like terms: 0 + -8 = -8
-8 + -40.8t + 16t2 = 8 + 40.8t + -16t2 + -8 + -40.8t + 16t2

Reorder the terms:
-8 + -40.8t + 16t2 = 8 + -8 + 40.8t + -40.8t + -16t2 + 16t2

Combine like terms: 8 + -8 = 0
-8 + -40.8t + 16t2 = 0 + 40.8t + -40.8t + -16t2 + 16t2
-8 + -40.8t + 16t2 = 40.8t + -40.8t + -16t2 + 16t2

Combine like terms: 40.8t + -40.8t = 0.0
-8 + -40.8t + 16t2 = 0.0 + -16t2 + 16t2
-8 + -40.8t + 16t2 = -16t2 + 16t2

Combine like terms: -16t2 + 16t2 = 0
-8 + -40.8t + 16t2 = 0

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

Divide each side by '16'.
-0.5 + -2.55t + t2 = 0

Move the constant term to the right:

Add '0.5' to each side of the equation.
-0.5 + -2.55t + 0.5 + t2 = 0 + 0.5

Reorder the terms:
-0.5 + 0.5 + -2.55t + t2 = 0 + 0.5

Combine like terms: -0.5 + 0.5 = 0.0
0.0 + -2.55t + t2 = 0 + 0.5
-2.55t + t2 = 0 + 0.5

Combine like terms: 0 + 0.5 = 0.5
-2.55t + t2 = 0.5

The t term is -2.55t.  Take half its coefficient (-1.275).
Square it (1.625625) and add it to both sides.

Add '1.625625' to each side of the equation.
-2.55t + 1.625625 + t2 = 0.5 + 1.625625

Reorder the terms:
1.625625 + -2.55t + t2 = 0.5 + 1.625625

Combine like terms: 0.5 + 1.625625 = 2.125625
1.625625 + -2.55t + t2 = 2.125625

Factor a perfect square on the left side:
(t + -1.275)(t + -1.275) = 2.125625

Calculate the square root of the right side: 1.457952331

Break this problem into two subproblems by setting 
(t + -1.275) equal to 1.457952331 and -1.457952331.

Subproblem 1

t + -1.275 = 1.457952331 Simplifying t + -1.275 = 1.457952331 Reorder the terms: -1.275 + t = 1.457952331 Solving -1.275 + t = 1.457952331 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.275' to each side of the equation. -1.275 + 1.275 + t = 1.457952331 + 1.275 Combine like terms: -1.275 + 1.275 = 0.000 0.000 + t = 1.457952331 + 1.275 t = 1.457952331 + 1.275 Combine like terms: 1.457952331 + 1.275 = 2.732952331 t = 2.732952331 Simplifying t = 2.732952331

Subproblem 2

t + -1.275 = -1.457952331 Simplifying t + -1.275 = -1.457952331 Reorder the terms: -1.275 + t = -1.457952331 Solving -1.275 + t = -1.457952331 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.275' to each side of the equation. -1.275 + 1.275 + t = -1.457952331 + 1.275 Combine like terms: -1.275 + 1.275 = 0.000 0.000 + t = -1.457952331 + 1.275 t = -1.457952331 + 1.275 Combine like terms: -1.457952331 + 1.275 = -0.182952331 t = -0.182952331 Simplifying t = -0.182952331

Solution

The solution to the problem is based on the solutions from the subproblems. t = {2.732952331, -0.182952331}

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