16t^2-55t-60=0

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Solution for 16t^2-55t-60=0 equation:


Simplifying
16t2 + -55t + -60 = 0

Reorder the terms:
-60 + -55t + 16t2 = 0

Solving
-60 + -55t + 16t2 = 0

Solving for variable 't'.

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

Divide each side by '16'.
-3.75 + -3.4375t + t2 = 0

Move the constant term to the right:

Add '3.75' to each side of the equation.
-3.75 + -3.4375t + 3.75 + t2 = 0 + 3.75

Reorder the terms:
-3.75 + 3.75 + -3.4375t + t2 = 0 + 3.75

Combine like terms: -3.75 + 3.75 = 0.00
0.00 + -3.4375t + t2 = 0 + 3.75
-3.4375t + t2 = 0 + 3.75

Combine like terms: 0 + 3.75 = 3.75
-3.4375t + t2 = 3.75

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 = 3.75 + 2.954101563

Reorder the terms:
2.954101563 + -3.4375t + t2 = 3.75 + 2.954101563

Combine like terms: 3.75 + 2.954101563 = 6.704101563
2.954101563 + -3.4375t + t2 = 6.704101563

Factor a perfect square on the left side:
(t + -1.71875)(t + -1.71875) = 6.704101563

Calculate the square root of the right side: 2.589227986

Break this problem into two subproblems by setting 
(t + -1.71875) equal to 2.589227986 and -2.589227986.

Subproblem 1

t + -1.71875 = 2.589227986 Simplifying t + -1.71875 = 2.589227986 Reorder the terms: -1.71875 + t = 2.589227986 Solving -1.71875 + t = 2.589227986 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 = 2.589227986 + 1.71875 Combine like terms: -1.71875 + 1.71875 = 0.00000 0.00000 + t = 2.589227986 + 1.71875 t = 2.589227986 + 1.71875 Combine like terms: 2.589227986 + 1.71875 = 4.307977986 t = 4.307977986 Simplifying t = 4.307977986

Subproblem 2

t + -1.71875 = -2.589227986 Simplifying t + -1.71875 = -2.589227986 Reorder the terms: -1.71875 + t = -2.589227986 Solving -1.71875 + t = -2.589227986 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 = -2.589227986 + 1.71875 Combine like terms: -1.71875 + 1.71875 = 0.00000 0.00000 + t = -2.589227986 + 1.71875 t = -2.589227986 + 1.71875 Combine like terms: -2.589227986 + 1.71875 = -0.870477986 t = -0.870477986 Simplifying t = -0.870477986

Solution

The solution to the problem is based on the solutions from the subproblems. t = {4.307977986, -0.870477986}

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