0=80t-16t^2+3.5

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Solution for 0=80t-16t^2+3.5 equation:


Simplifying
0 = 80t + -16t2 + 3.5

Reorder the terms:
0 = 3.5 + 80t + -16t2

Solving
0 = 3.5 + 80t + -16t2

Solving for variable 't'.

Combine like terms: 0 + -3.5 = -3.5
-3.5 + -80t + 16t2 = 3.5 + 80t + -16t2 + -3.5 + -80t + 16t2

Reorder the terms:
-3.5 + -80t + 16t2 = 3.5 + -3.5 + 80t + -80t + -16t2 + 16t2

Combine like terms: 3.5 + -3.5 = 0.0
-3.5 + -80t + 16t2 = 0.0 + 80t + -80t + -16t2 + 16t2
-3.5 + -80t + 16t2 = 80t + -80t + -16t2 + 16t2

Combine like terms: 80t + -80t = 0
-3.5 + -80t + 16t2 = 0 + -16t2 + 16t2
-3.5 + -80t + 16t2 = -16t2 + 16t2

Combine like terms: -16t2 + 16t2 = 0
-3.5 + -80t + 16t2 = 0

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

Divide each side by '16'.
-0.21875 + -5t + t2 = 0

Move the constant term to the right:

Add '0.21875' to each side of the equation.
-0.21875 + -5t + 0.21875 + t2 = 0 + 0.21875

Reorder the terms:
-0.21875 + 0.21875 + -5t + t2 = 0 + 0.21875

Combine like terms: -0.21875 + 0.21875 = 0.00000
0.00000 + -5t + t2 = 0 + 0.21875
-5t + t2 = 0 + 0.21875

Combine like terms: 0 + 0.21875 = 0.21875
-5t + t2 = 0.21875

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 = 0.21875 + 6.25

Reorder the terms:
6.25 + -5t + t2 = 0.21875 + 6.25

Combine like terms: 0.21875 + 6.25 = 6.46875
6.25 + -5t + t2 = 6.46875

Factor a perfect square on the left side:
(t + -2.5)(t + -2.5) = 6.46875

Calculate the square root of the right side: 2.543373744

Break this problem into two subproblems by setting 
(t + -2.5) equal to 2.543373744 and -2.543373744.

Subproblem 1

t + -2.5 = 2.543373744 Simplifying t + -2.5 = 2.543373744 Reorder the terms: -2.5 + t = 2.543373744 Solving -2.5 + t = 2.543373744 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 = 2.543373744 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + t = 2.543373744 + 2.5 t = 2.543373744 + 2.5 Combine like terms: 2.543373744 + 2.5 = 5.043373744 t = 5.043373744 Simplifying t = 5.043373744

Subproblem 2

t + -2.5 = -2.543373744 Simplifying t + -2.5 = -2.543373744 Reorder the terms: -2.5 + t = -2.543373744 Solving -2.5 + t = -2.543373744 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 = -2.543373744 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + t = -2.543373744 + 2.5 t = -2.543373744 + 2.5 Combine like terms: -2.543373744 + 2.5 = -0.043373744 t = -0.043373744 Simplifying t = -0.043373744

Solution

The solution to the problem is based on the solutions from the subproblems. t = {5.043373744, -0.043373744}

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