-16.1(t*t)+40t=4

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Solution for -16.1(t*t)+40t=4 equation:


Simplifying
-16.1(t * t) + 40t = 4

Multiply t * t
-16.1(t2) + 40t = 4

Reorder the terms:
40t + -16.1t2 = 4

Solving
40t + -16.1t2 = 4

Solving for variable 't'.

Reorder the terms:
-4 + 40t + -16.1t2 = 4 + -4

Combine like terms: 4 + -4 = 0
-4 + 40t + -16.1t2 = 0

Begin completing the square.  Divide all terms by
-16.1 the coefficient of the squared term: 

Divide each side by '-16.1'.
0.248447205 + -2.48447205t + t2 = 0

Move the constant term to the right:

Add '-0.248447205' to each side of the equation.
0.248447205 + -2.48447205t + -0.248447205 + t2 = 0 + -0.248447205

Reorder the terms:
0.248447205 + -0.248447205 + -2.48447205t + t2 = 0 + -0.248447205

Combine like terms: 0.248447205 + -0.248447205 = 0.000000000
0.000000000 + -2.48447205t + t2 = 0 + -0.248447205
-2.48447205t + t2 = 0 + -0.248447205

Combine like terms: 0 + -0.248447205 = -0.248447205
-2.48447205t + t2 = -0.248447205

The t term is -2.48447205t.  Take half its coefficient (-1.242236025).
Square it (1.543150342) and add it to both sides.

Add '1.543150342' to each side of the equation.
-2.48447205t + 1.543150342 + t2 = -0.248447205 + 1.543150342

Reorder the terms:
1.543150342 + -2.48447205t + t2 = -0.248447205 + 1.543150342

Combine like terms: -0.248447205 + 1.543150342 = 1.294703137
1.543150342 + -2.48447205t + t2 = 1.294703137

Factor a perfect square on the left side:
(t + -1.242236025)(t + -1.242236025) = 1.294703137

Calculate the square root of the right side: 1.137850226

Break this problem into two subproblems by setting 
(t + -1.242236025) equal to 1.137850226 and -1.137850226.

Subproblem 1

t + -1.242236025 = 1.137850226 Simplifying t + -1.242236025 = 1.137850226 Reorder the terms: -1.242236025 + t = 1.137850226 Solving -1.242236025 + t = 1.137850226 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.242236025' to each side of the equation. -1.242236025 + 1.242236025 + t = 1.137850226 + 1.242236025 Combine like terms: -1.242236025 + 1.242236025 = 0.000000000 0.000000000 + t = 1.137850226 + 1.242236025 t = 1.137850226 + 1.242236025 Combine like terms: 1.137850226 + 1.242236025 = 2.380086251 t = 2.380086251 Simplifying t = 2.380086251

Subproblem 2

t + -1.242236025 = -1.137850226 Simplifying t + -1.242236025 = -1.137850226 Reorder the terms: -1.242236025 + t = -1.137850226 Solving -1.242236025 + t = -1.137850226 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.242236025' to each side of the equation. -1.242236025 + 1.242236025 + t = -1.137850226 + 1.242236025 Combine like terms: -1.242236025 + 1.242236025 = 0.000000000 0.000000000 + t = -1.137850226 + 1.242236025 t = -1.137850226 + 1.242236025 Combine like terms: -1.137850226 + 1.242236025 = 0.104385799 t = 0.104385799 Simplifying t = 0.104385799

Solution

The solution to the problem is based on the solutions from the subproblems. t = {2.380086251, 0.104385799}

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