t=-4.9t^2+39.2t+1

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Solution for t=-4.9t^2+39.2t+1 equation:


Simplifying
t = -4.9t2 + 39.2t + 1

Reorder the terms:
t = 1 + 39.2t + -4.9t2

Solving
t = 1 + 39.2t + -4.9t2

Solving for variable 't'.

Reorder the terms:
-1 + t + -39.2t + 4.9t2 = 1 + 39.2t + -4.9t2 + -1 + -39.2t + 4.9t2

Combine like terms: t + -39.2t = -38.2t
-1 + -38.2t + 4.9t2 = 1 + 39.2t + -4.9t2 + -1 + -39.2t + 4.9t2

Reorder the terms:
-1 + -38.2t + 4.9t2 = 1 + -1 + 39.2t + -39.2t + -4.9t2 + 4.9t2

Combine like terms: 1 + -1 = 0
-1 + -38.2t + 4.9t2 = 0 + 39.2t + -39.2t + -4.9t2 + 4.9t2
-1 + -38.2t + 4.9t2 = 39.2t + -39.2t + -4.9t2 + 4.9t2

Combine like terms: 39.2t + -39.2t = 0.0
-1 + -38.2t + 4.9t2 = 0.0 + -4.9t2 + 4.9t2
-1 + -38.2t + 4.9t2 = -4.9t2 + 4.9t2

Combine like terms: -4.9t2 + 4.9t2 = 0.0
-1 + -38.2t + 4.9t2 = 0.0

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

Divide each side by '4.9'.
-0.2040816327 + -7.795918367t + t2 = 0

Move the constant term to the right:

Add '0.2040816327' to each side of the equation.
-0.2040816327 + -7.795918367t + 0.2040816327 + t2 = 0 + 0.2040816327

Reorder the terms:
-0.2040816327 + 0.2040816327 + -7.795918367t + t2 = 0 + 0.2040816327

Combine like terms: -0.2040816327 + 0.2040816327 = 0.0000000000
0.0000000000 + -7.795918367t + t2 = 0 + 0.2040816327
-7.795918367t + t2 = 0 + 0.2040816327

Combine like terms: 0 + 0.2040816327 = 0.2040816327
-7.795918367t + t2 = 0.2040816327

The t term is -7.795918367t.  Take half its coefficient (-3.897959184).
Square it (15.19408580) and add it to both sides.

Add '15.19408580' to each side of the equation.
-7.795918367t + 15.19408580 + t2 = 0.2040816327 + 15.19408580

Reorder the terms:
15.19408580 + -7.795918367t + t2 = 0.2040816327 + 15.19408580

Combine like terms: 0.2040816327 + 15.19408580 = 15.3981674327
15.19408580 + -7.795918367t + t2 = 15.3981674327

Factor a perfect square on the left side:
(t + -3.897959184)(t + -3.897959184) = 15.3981674327

Calculate the square root of the right side: 3.924049876

Break this problem into two subproblems by setting 
(t + -3.897959184) equal to 3.924049876 and -3.924049876.

Subproblem 1

t + -3.897959184 = 3.924049876 Simplifying t + -3.897959184 = 3.924049876 Reorder the terms: -3.897959184 + t = 3.924049876 Solving -3.897959184 + t = 3.924049876 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '3.897959184' to each side of the equation. -3.897959184 + 3.897959184 + t = 3.924049876 + 3.897959184 Combine like terms: -3.897959184 + 3.897959184 = 0.000000000 0.000000000 + t = 3.924049876 + 3.897959184 t = 3.924049876 + 3.897959184 Combine like terms: 3.924049876 + 3.897959184 = 7.82200906 t = 7.82200906 Simplifying t = 7.82200906

Subproblem 2

t + -3.897959184 = -3.924049876 Simplifying t + -3.897959184 = -3.924049876 Reorder the terms: -3.897959184 + t = -3.924049876 Solving -3.897959184 + t = -3.924049876 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '3.897959184' to each side of the equation. -3.897959184 + 3.897959184 + t = -3.924049876 + 3.897959184 Combine like terms: -3.897959184 + 3.897959184 = 0.000000000 0.000000000 + t = -3.924049876 + 3.897959184 t = -3.924049876 + 3.897959184 Combine like terms: -3.924049876 + 3.897959184 = -0.026090692 t = -0.026090692 Simplifying t = -0.026090692

Solution

The solution to the problem is based on the solutions from the subproblems. t = {7.82200906, -0.026090692}

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