0=-16t^2+55t+4

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Solution for 0=-16t^2+55t+4 equation:


Simplifying
0 = -16t2 + 55t + 4

Reorder the terms:
0 = 4 + 55t + -16t2

Solving
0 = 4 + 55t + -16t2

Solving for variable 't'.

Combine like terms: 0 + -4 = -4
-4 + -55t + 16t2 = 4 + 55t + -16t2 + -4 + -55t + 16t2

Reorder the terms:
-4 + -55t + 16t2 = 4 + -4 + 55t + -55t + -16t2 + 16t2

Combine like terms: 4 + -4 = 0
-4 + -55t + 16t2 = 0 + 55t + -55t + -16t2 + 16t2
-4 + -55t + 16t2 = 55t + -55t + -16t2 + 16t2

Combine like terms: 55t + -55t = 0
-4 + -55t + 16t2 = 0 + -16t2 + 16t2
-4 + -55t + 16t2 = -16t2 + 16t2

Combine like terms: -16t2 + 16t2 = 0
-4 + -55t + 16t2 = 0

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

Divide each side by '16'.
-0.25 + -3.4375t + t2 = 0

Move the constant term to the right:

Add '0.25' to each side of the equation.
-0.25 + -3.4375t + 0.25 + t2 = 0 + 0.25

Reorder the terms:
-0.25 + 0.25 + -3.4375t + t2 = 0 + 0.25

Combine like terms: -0.25 + 0.25 = 0.00
0.00 + -3.4375t + t2 = 0 + 0.25
-3.4375t + t2 = 0 + 0.25

Combine like terms: 0 + 0.25 = 0.25
-3.4375t + t2 = 0.25

The t term is -3.4375t.  Take half its coefficient (-1.71875).
Square it (2.954101563) and add it to both sides.

Add '2.954101563' to each side of the equation.
-3.4375t + 2.954101563 + t2 = 0.25 + 2.954101563

Reorder the terms:
2.954101563 + -3.4375t + t2 = 0.25 + 2.954101563

Combine like terms: 0.25 + 2.954101563 = 3.204101563
2.954101563 + -3.4375t + t2 = 3.204101563

Factor a perfect square on the left side:
(t + -1.71875)(t + -1.71875) = 3.204101563

Calculate the square root of the right side: 1.790000437

Break this problem into two subproblems by setting 
(t + -1.71875) equal to 1.790000437 and -1.790000437.

Subproblem 1

t + -1.71875 = 1.790000437 Simplifying t + -1.71875 = 1.790000437 Reorder the terms: -1.71875 + t = 1.790000437 Solving -1.71875 + t = 1.790000437 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.71875' to each side of the equation. -1.71875 + 1.71875 + t = 1.790000437 + 1.71875 Combine like terms: -1.71875 + 1.71875 = 0.00000 0.00000 + t = 1.790000437 + 1.71875 t = 1.790000437 + 1.71875 Combine like terms: 1.790000437 + 1.71875 = 3.508750437 t = 3.508750437 Simplifying t = 3.508750437

Subproblem 2

t + -1.71875 = -1.790000437 Simplifying t + -1.71875 = -1.790000437 Reorder the terms: -1.71875 + t = -1.790000437 Solving -1.71875 + t = -1.790000437 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.71875' to each side of the equation. -1.71875 + 1.71875 + t = -1.790000437 + 1.71875 Combine like terms: -1.71875 + 1.71875 = 0.00000 0.00000 + t = -1.790000437 + 1.71875 t = -1.790000437 + 1.71875 Combine like terms: -1.790000437 + 1.71875 = -0.071250437 t = -0.071250437 Simplifying t = -0.071250437

Solution

The solution to the problem is based on the solutions from the subproblems. t = {3.508750437, -0.071250437}

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