0=-4.9t^2+11t+.2

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Solution for 0=-4.9t^2+11t+.2 equation:


Simplifying
0 = -4.9t2 + 11t + 0.2

Reorder the terms:
0 = 0.2 + 11t + -4.9t2

Solving
0 = 0.2 + 11t + -4.9t2

Solving for variable 't'.

Combine like terms: 0 + -0.2 = -0.2
-0.2 + -11t + 4.9t2 = 0.2 + 11t + -4.9t2 + -0.2 + -11t + 4.9t2

Reorder the terms:
-0.2 + -11t + 4.9t2 = 0.2 + -0.2 + 11t + -11t + -4.9t2 + 4.9t2

Combine like terms: 0.2 + -0.2 = 0.0
-0.2 + -11t + 4.9t2 = 0.0 + 11t + -11t + -4.9t2 + 4.9t2
-0.2 + -11t + 4.9t2 = 11t + -11t + -4.9t2 + 4.9t2

Combine like terms: 11t + -11t = 0
-0.2 + -11t + 4.9t2 = 0 + -4.9t2 + 4.9t2
-0.2 + -11t + 4.9t2 = -4.9t2 + 4.9t2

Combine like terms: -4.9t2 + 4.9t2 = 0.0
-0.2 + -11t + 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'.
-0.04081632653 + -2.244897959t + t2 = 0

Move the constant term to the right:

Add '0.04081632653' to each side of the equation.
-0.04081632653 + -2.244897959t + 0.04081632653 + t2 = 0 + 0.04081632653

Reorder the terms:
-0.04081632653 + 0.04081632653 + -2.244897959t + t2 = 0 + 0.04081632653

Combine like terms: -0.04081632653 + 0.04081632653 = 0.00000000000
0.00000000000 + -2.244897959t + t2 = 0 + 0.04081632653
-2.244897959t + t2 = 0 + 0.04081632653

Combine like terms: 0 + 0.04081632653 = 0.04081632653
-2.244897959t + t2 = 0.04081632653

The t term is -2.244897959t.  Take half its coefficient (-1.12244898).
Square it (1.259891713) and add it to both sides.

Add '1.259891713' to each side of the equation.
-2.244897959t + 1.259891713 + t2 = 0.04081632653 + 1.259891713

Reorder the terms:
1.259891713 + -2.244897959t + t2 = 0.04081632653 + 1.259891713

Combine like terms: 0.04081632653 + 1.259891713 = 1.30070803953
1.259891713 + -2.244897959t + t2 = 1.30070803953

Factor a perfect square on the left side:
(t + -1.12244898)(t + -1.12244898) = 1.30070803953

Calculate the square root of the right side: 1.140485879

Break this problem into two subproblems by setting 
(t + -1.12244898) equal to 1.140485879 and -1.140485879.

Subproblem 1

t + -1.12244898 = 1.140485879 Simplifying t + -1.12244898 = 1.140485879 Reorder the terms: -1.12244898 + t = 1.140485879 Solving -1.12244898 + t = 1.140485879 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.12244898' to each side of the equation. -1.12244898 + 1.12244898 + t = 1.140485879 + 1.12244898 Combine like terms: -1.12244898 + 1.12244898 = 0.00000000 0.00000000 + t = 1.140485879 + 1.12244898 t = 1.140485879 + 1.12244898 Combine like terms: 1.140485879 + 1.12244898 = 2.262934859 t = 2.262934859 Simplifying t = 2.262934859

Subproblem 2

t + -1.12244898 = -1.140485879 Simplifying t + -1.12244898 = -1.140485879 Reorder the terms: -1.12244898 + t = -1.140485879 Solving -1.12244898 + t = -1.140485879 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.12244898' to each side of the equation. -1.12244898 + 1.12244898 + t = -1.140485879 + 1.12244898 Combine like terms: -1.12244898 + 1.12244898 = 0.00000000 0.00000000 + t = -1.140485879 + 1.12244898 t = -1.140485879 + 1.12244898 Combine like terms: -1.140485879 + 1.12244898 = -0.018036899 t = -0.018036899 Simplifying t = -0.018036899

Solution

The solution to the problem is based on the solutions from the subproblems. t = {2.262934859, -0.018036899}

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