4.9t^2+3t-800=0

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Solution for 4.9t^2+3t-800=0 equation:


Simplifying
4.9t2 + 3t + -800 = 0

Reorder the terms:
-800 + 3t + 4.9t2 = 0

Solving
-800 + 3t + 4.9t2 = 0

Solving for variable 't'.

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

Divide each side by '4.9'.
-163.2653061 + 0.612244898t + t2 = 0

Move the constant term to the right:

Add '163.2653061' to each side of the equation.
-163.2653061 + 0.612244898t + 163.2653061 + t2 = 0 + 163.2653061

Reorder the terms:
-163.2653061 + 163.2653061 + 0.612244898t + t2 = 0 + 163.2653061

Combine like terms: -163.2653061 + 163.2653061 = 0.0000000
0.0000000 + 0.612244898t + t2 = 0 + 163.2653061
0.612244898t + t2 = 0 + 163.2653061

Combine like terms: 0 + 163.2653061 = 163.2653061
0.612244898t + t2 = 163.2653061

The t term is 0.612244898t.  Take half its coefficient (0.306122449).
Square it (0.09371095378) and add it to both sides.

Add '0.09371095378' to each side of the equation.
0.612244898t + 0.09371095378 + t2 = 163.2653061 + 0.09371095378

Reorder the terms:
0.09371095378 + 0.612244898t + t2 = 163.2653061 + 0.09371095378

Combine like terms: 163.2653061 + 0.09371095378 = 163.35901705378
0.09371095378 + 0.612244898t + t2 = 163.35901705378

Factor a perfect square on the left side:
(t + 0.306122449)(t + 0.306122449) = 163.35901705378

Calculate the square root of the right side: 12.781197794

Break this problem into two subproblems by setting 
(t + 0.306122449) equal to 12.781197794 and -12.781197794.

Subproblem 1

t + 0.306122449 = 12.781197794 Simplifying t + 0.306122449 = 12.781197794 Reorder the terms: 0.306122449 + t = 12.781197794 Solving 0.306122449 + t = 12.781197794 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.306122449' to each side of the equation. 0.306122449 + -0.306122449 + t = 12.781197794 + -0.306122449 Combine like terms: 0.306122449 + -0.306122449 = 0.000000000 0.000000000 + t = 12.781197794 + -0.306122449 t = 12.781197794 + -0.306122449 Combine like terms: 12.781197794 + -0.306122449 = 12.475075345 t = 12.475075345 Simplifying t = 12.475075345

Subproblem 2

t + 0.306122449 = -12.781197794 Simplifying t + 0.306122449 = -12.781197794 Reorder the terms: 0.306122449 + t = -12.781197794 Solving 0.306122449 + t = -12.781197794 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.306122449' to each side of the equation. 0.306122449 + -0.306122449 + t = -12.781197794 + -0.306122449 Combine like terms: 0.306122449 + -0.306122449 = 0.000000000 0.000000000 + t = -12.781197794 + -0.306122449 t = -12.781197794 + -0.306122449 Combine like terms: -12.781197794 + -0.306122449 = -13.087320243 t = -13.087320243 Simplifying t = -13.087320243

Solution

The solution to the problem is based on the solutions from the subproblems. t = {12.475075345, -13.087320243}

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