-16t^2+20t+1200=0

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Solution for -16t^2+20t+1200=0 equation: 


Simplifying
-16t2 + 20t + 1200 = 0

Reorder the terms:
1200 + 20t + -16t2 = 0

Solving
1200 + 20t + -16t2 = 0

Solving for variable 't'.

Factor out the Greatest Common Factor (GCF), '4'.
4(300 + 5t + -4t2) = 0

Ignore the factor 4.

Subproblem 1
Set the factor '(300 + 5t + -4t2)' equal to zero and attempt to solve:

Simplifying
300 + 5t + -4t2 = 0

Solving
300 + 5t + -4t2 = 0

Begin completing the square.  Divide all terms by
-4 the coefficient of the squared term: 

Divide each side by '-4'.
-75 + -1.25t + t2 = 0

Move the constant term to the right:

Add '75' to each side of the equation.
-75 + -1.25t + 75 + t2 = 0 + 75

Reorder the terms:
-75 + 75 + -1.25t + t2 = 0 + 75

Combine like terms: -75 + 75 = 0
0 + -1.25t + t2 = 0 + 75
-1.25t + t2 = 0 + 75

Combine like terms: 0 + 75 = 75
-1.25t + t2 = 75

The t term is -1.25t.  Take half its coefficient (-0.625).
Square it (0.390625) and add it to both sides.

Add '0.390625' to each side of the equation.
-1.25t + 0.390625 + t2 = 75 + 0.390625

Reorder the terms:
0.390625 + -1.25t + t2 = 75 + 0.390625

Combine like terms: 75 + 0.390625 = 75.390625
0.390625 + -1.25t + t2 = 75.390625

Factor a perfect square on the left side:
(t + -0.625)(t + -0.625) = 75.390625

Calculate the square root of the right side: 8.682777493

Break this problem into two subproblems by setting 
(t + -0.625) equal to 8.682777493 and -8.682777493.


Subproblem 1
t + -0.625 = 8.682777493

Simplifying
t + -0.625 = 8.682777493

Reorder the terms:
-0.625 + t = 8.682777493

Solving
-0.625 + t = 8.682777493

Solving for variable 't'.

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

Add '0.625' to each side of the equation.
-0.625 + 0.625 + t = 8.682777493 + 0.625

Combine like terms: -0.625 + 0.625 = 0.000
0.000 + t = 8.682777493 + 0.625
t = 8.682777493 + 0.625

Combine like terms: 8.682777493 + 0.625 = 9.307777493
t = 9.307777493

Simplifying
t = 9.307777493


Subproblem 2
t + -0.625 = -8.682777493

Simplifying
t + -0.625 = -8.682777493

Reorder the terms:
-0.625 + t = -8.682777493

Solving
-0.625 + t = -8.682777493

Solving for variable 't'.

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

Add '0.625' to each side of the equation.
-0.625 + 0.625 + t = -8.682777493 + 0.625

Combine like terms: -0.625 + 0.625 = 0.000
0.000 + t = -8.682777493 + 0.625
t = -8.682777493 + 0.625

Combine like terms: -8.682777493 + 0.625 = -8.057777493
t = -8.057777493

Simplifying
t = -8.057777493


Solution
The solution to the problem is based on the solutions
from the subproblems.
t = {9.307777493, -8.057777493}
Solution
t = {9.307777493, -8.057777493}

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