14=1.65-.0056t+0.001683t^2

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Solution for 14=1.65-.0056t+0.001683t^2 equation:


Simplifying
14 = 1.65 + -0.0056t + 0.001683t2

Solving
14 = 1.65 + -0.0056t + 0.001683t2

Solving for variable 't'.

Combine like terms: 14 + -1.65 = 12.35
12.35 + 0.0056t + -0.001683t2 = 1.65 + -0.0056t + 0.001683t2 + -1.65 + 0.0056t + -0.001683t2

Reorder the terms:
12.35 + 0.0056t + -0.001683t2 = 1.65 + -1.65 + -0.0056t + 0.0056t + 0.001683t2 + -0.001683t2

Combine like terms: 1.65 + -1.65 = 0.00
12.35 + 0.0056t + -0.001683t2 = 0.00 + -0.0056t + 0.0056t + 0.001683t2 + -0.001683t2
12.35 + 0.0056t + -0.001683t2 = -0.0056t + 0.0056t + 0.001683t2 + -0.001683t2

Combine like terms: -0.0056t + 0.0056t = 0.0000
12.35 + 0.0056t + -0.001683t2 = 0.0000 + 0.001683t2 + -0.001683t2
12.35 + 0.0056t + -0.001683t2 = 0.001683t2 + -0.001683t2

Combine like terms: 0.001683t2 + -0.001683t2 = 0.000000
12.35 + 0.0056t + -0.001683t2 = 0.000000

Begin completing the square.  Divide all terms by
-0.001683 the coefficient of the squared term: 

Divide each side by '-0.001683'.
-7338.08675 + -3.327391563t + t2 = 0

Move the constant term to the right:

Add '7338.08675' to each side of the equation.
-7338.08675 + -3.327391563t + 7338.08675 + t2 = 0 + 7338.08675

Reorder the terms:
-7338.08675 + 7338.08675 + -3.327391563t + t2 = 0 + 7338.08675

Combine like terms: -7338.08675 + 7338.08675 = 0.00000
0.00000 + -3.327391563t + t2 = 0 + 7338.08675
-3.327391563t + t2 = 0 + 7338.08675

Combine like terms: 0 + 7338.08675 = 7338.08675
-3.327391563t + t2 = 7338.08675

The t term is -3.327391563t.  Take half its coefficient (-1.663695782).
Square it (2.767883655) and add it to both sides.

Add '2.767883655' to each side of the equation.
-3.327391563t + 2.767883655 + t2 = 7338.08675 + 2.767883655

Reorder the terms:
2.767883655 + -3.327391563t + t2 = 7338.08675 + 2.767883655

Combine like terms: 7338.08675 + 2.767883655 = 7340.854633655
2.767883655 + -3.327391563t + t2 = 7340.854633655

Factor a perfect square on the left side:
(t + -1.663695782)(t + -1.663695782) = 7340.854633655

Calculate the square root of the right side: 85.678787536

Break this problem into two subproblems by setting 
(t + -1.663695782) equal to 85.678787536 and -85.678787536.

Subproblem 1

t + -1.663695782 = 85.678787536 Simplifying t + -1.663695782 = 85.678787536 Reorder the terms: -1.663695782 + t = 85.678787536 Solving -1.663695782 + t = 85.678787536 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.663695782' to each side of the equation. -1.663695782 + 1.663695782 + t = 85.678787536 + 1.663695782 Combine like terms: -1.663695782 + 1.663695782 = 0.000000000 0.000000000 + t = 85.678787536 + 1.663695782 t = 85.678787536 + 1.663695782 Combine like terms: 85.678787536 + 1.663695782 = 87.342483318 t = 87.342483318 Simplifying t = 87.342483318

Subproblem 2

t + -1.663695782 = -85.678787536 Simplifying t + -1.663695782 = -85.678787536 Reorder the terms: -1.663695782 + t = -85.678787536 Solving -1.663695782 + t = -85.678787536 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.663695782' to each side of the equation. -1.663695782 + 1.663695782 + t = -85.678787536 + 1.663695782 Combine like terms: -1.663695782 + 1.663695782 = 0.000000000 0.000000000 + t = -85.678787536 + 1.663695782 t = -85.678787536 + 1.663695782 Combine like terms: -85.678787536 + 1.663695782 = -84.015091754 t = -84.015091754 Simplifying t = -84.015091754

Solution

The solution to the problem is based on the solutions from the subproblems. t = {87.342483318, -84.015091754}

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