-4.9t^2-4t+200=0

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Solution for -4.9t^2-4t+200=0 equation:


Simplifying
-4.9t2 + -4t + 200 = 0

Reorder the terms:
200 + -4t + -4.9t2 = 0

Solving
200 + -4t + -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'.
-40.81632653 + 0.8163265306t + t2 = 0

Move the constant term to the right:

Add '40.81632653' to each side of the equation.
-40.81632653 + 0.8163265306t + 40.81632653 + t2 = 0 + 40.81632653

Reorder the terms:
-40.81632653 + 40.81632653 + 0.8163265306t + t2 = 0 + 40.81632653

Combine like terms: -40.81632653 + 40.81632653 = 0.00000000
0.00000000 + 0.8163265306t + t2 = 0 + 40.81632653
0.8163265306t + t2 = 0 + 40.81632653

Combine like terms: 0 + 40.81632653 = 40.81632653
0.8163265306t + t2 = 40.81632653

The t term is 0.8163265306t.  Take half its coefficient (0.4081632653).
Square it (0.1665972511) and add it to both sides.

Add '0.1665972511' to each side of the equation.
0.8163265306t + 0.1665972511 + t2 = 40.81632653 + 0.1665972511

Reorder the terms:
0.1665972511 + 0.8163265306t + t2 = 40.81632653 + 0.1665972511

Combine like terms: 40.81632653 + 0.1665972511 = 40.9829237811
0.1665972511 + 0.8163265306t + t2 = 40.9829237811

Factor a perfect square on the left side:
(t + 0.4081632653)(t + 0.4081632653) = 40.9829237811

Calculate the square root of the right side: 6.40179067

Break this problem into two subproblems by setting 
(t + 0.4081632653) equal to 6.40179067 and -6.40179067.

Subproblem 1

t + 0.4081632653 = 6.40179067 Simplifying t + 0.4081632653 = 6.40179067 Reorder the terms: 0.4081632653 + t = 6.40179067 Solving 0.4081632653 + t = 6.40179067 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.4081632653' to each side of the equation. 0.4081632653 + -0.4081632653 + t = 6.40179067 + -0.4081632653 Combine like terms: 0.4081632653 + -0.4081632653 = 0.0000000000 0.0000000000 + t = 6.40179067 + -0.4081632653 t = 6.40179067 + -0.4081632653 Combine like terms: 6.40179067 + -0.4081632653 = 5.9936274047 t = 5.9936274047 Simplifying t = 5.9936274047

Subproblem 2

t + 0.4081632653 = -6.40179067 Simplifying t + 0.4081632653 = -6.40179067 Reorder the terms: 0.4081632653 + t = -6.40179067 Solving 0.4081632653 + t = -6.40179067 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.4081632653' to each side of the equation. 0.4081632653 + -0.4081632653 + t = -6.40179067 + -0.4081632653 Combine like terms: 0.4081632653 + -0.4081632653 = 0.0000000000 0.0000000000 + t = -6.40179067 + -0.4081632653 t = -6.40179067 + -0.4081632653 Combine like terms: -6.40179067 + -0.4081632653 = -6.8099539353 t = -6.8099539353 Simplifying t = -6.8099539353

Solution

The solution to the problem is based on the solutions from the subproblems. t = {5.9936274047, -6.8099539353}

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