0=-8(2t^2-6t-10)

Solution for 0=-8(2t^2-6t-10) equation:

Simplifying
0 = -8(2t2 + -6t + -10)

Reorder the terms:
0 = -8(-10 + -6t + 2t2)
0 = (-10 * -8 + -6t * -8 + 2t2 * -8)
0 = (80 + 48t + -16t2)

Solving
0 = 80 + 48t + -16t2

Solving for variable 't'.

Combine like terms: 0 + -80 = -80
-80 + -48t + 16t2 = 80 + 48t + -16t2 + -80 + -48t + 16t2

Reorder the terms:
-80 + -48t + 16t2 = 80 + -80 + 48t + -48t + -16t2 + 16t2

Combine like terms: 80 + -80 = 0
-80 + -48t + 16t2 = 0 + 48t + -48t + -16t2 + 16t2
-80 + -48t + 16t2 = 48t + -48t + -16t2 + 16t2

Combine like terms: 48t + -48t = 0
-80 + -48t + 16t2 = 0 + -16t2 + 16t2
-80 + -48t + 16t2 = -16t2 + 16t2

Combine like terms: -16t2 + 16t2 = 0
-80 + -48t + 16t2 = 0

Factor out the Greatest Common Factor (GCF), '16'.
16(-5 + -3t + t2) = 0

Ignore the factor 16.
Subproblem 1
Set the factor '(-5 + -3t + t2)' equal to zero and attempt to solve:

Simplifying
-5 + -3t + t2 = 0

Solving
-5 + -3t + t2 = 0

Begin completing the square.

Move the constant term to the right:

Add '5' to each side of the equation.
-5 + -3t + 5 + t2 = 0 + 5

Reorder the terms:
-5 + 5 + -3t + t2 = 0 + 5

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

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

The t term is -3t.  Take half its coefficient (-1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
-3t + 2.25 + t2 = 5 + 2.25

Reorder the terms:
2.25 + -3t + t2 = 5 + 2.25

Combine like terms: 5 + 2.25 = 7.25
2.25 + -3t + t2 = 7.25

Factor a perfect square on the left side:
(t + -1.5)(t + -1.5) = 7.25

Calculate the square root of the right side: 2.692582404

Break this problem into two subproblems by setting 
(t + -1.5) equal to 2.692582404 and -2.692582404.

Subproblem 1
t + -1.5 = 2.692582404

Simplifying
t + -1.5 = 2.692582404

Reorder the terms:
-1.5 + t = 2.692582404

Solving
-1.5 + t = 2.692582404

Solving for variable 't'.

Move all terms containing t to the left, all other terms to the right.

Add '1.5' to each side of the equation.
-1.5 + 1.5 + t = 2.692582404 + 1.5

Combine like terms: -1.5 + 1.5 = 0.0
0.0 + t = 2.692582404 + 1.5
t = 2.692582404 + 1.5

Combine like terms: 2.692582404 + 1.5 = 4.192582404
t = 4.192582404

Simplifying
t = 4.192582404

Subproblem 2
t + -1.5 = -2.692582404

Simplifying
t + -1.5 = -2.692582404

Reorder the terms:
-1.5 + t = -2.692582404

Solving
-1.5 + t = -2.692582404

Solving for variable 't'.

Move all terms containing t to the left, all other terms to the right.

Add '1.5' to each side of the equation.
-1.5 + 1.5 + t = -2.692582404 + 1.5

Combine like terms: -1.5 + 1.5 = 0.0
0.0 + t = -2.692582404 + 1.5
t = -2.692582404 + 1.5

Combine like terms: -2.692582404 + 1.5 = -1.192582404
t = -1.192582404

Simplifying
t = -1.192582404

Solution
The solution to the problem is based on the solutions
from the subproblems.
t = {4.192582404, -1.192582404}
Solution
t = {4.192582404, -1.192582404}